{"id":3858,"date":"2019-07-11T15:41:28","date_gmt":"2019-07-11T15:41:28","guid":{"rendered":"https:\/\/www.ammunitiontogo.com\/lodge\/?p=3858"},"modified":"2023-03-15T14:19:18","modified_gmt":"2023-03-15T14:19:18","slug":"muzzle-energy-calculator","status":"publish","type":"post","link":"https:\/\/www.ammunitiontogo.com\/lodge\/muzzle-energy-calculator\/","title":{"rendered":"Muzzle Energy Calculator &amp; Guide"},"content":{"rendered":"<p>Few people completely understand the math necessary to calculate muzzle energy. However, it&#8217;s nice to have solid data when you\u2019re scrolling through a website trying to choose the best ammunition option; It\u2019s hard to argue with numbers, after all.<\/p>\n        <script type=\"text\/javascript\">\n\n            (function( $ ) {\n                'use strict';\n\n                var isECValValid  = function (val) {\n\n                    if($.isNumeric(val)){\n                        if(val>0){\n                            return true;\n                        }\n                    }\n                    return false;\n                };\n\n                 var calculateEnergy = function(btn) {\n\n                     var weight = $(\"#mec-weight\").val();\n                     var velocity = $(\"#mec-velocity\").val();\n\n                     if(isECValValid(weight) && isECValValid(velocity)){\n                        $(\"#mec-result\").text(((Math.pow(velocity,2)*weight) \/ 450395).toFixed(0));\n                     } else {\n                         if(btn){\n                             $(\"#mec-weight\").addClass('error');\n                             $(\"#mec-velocity\").addClass('error');\n                             setTimeout(\n                                 function () {\n                                     $(\"#mec-weight\").removeClass('error');\n                                     $(\"#mec-velocity\").removeClass('error');\n                                 },\n                                 500\n                             );\n                         }\n                     }\n\n                 };\n\n                 $(function() {\n                     $(\".b-muzzle-energy-calculator_action\").on(\"click\",function (evt) {\n                         calculateEnergy(true);\n                         evt.preventDefault();\n                     });\n\n                    $(\"#mec-weight\").on(\"change paste keyup\",function() {\n                         calculateEnergy(false);\n                    });\n\n                    $(\"#mec-velocity\").on(\"change paste keyup\",function() {\n                         calculateEnergy(false);\n                    });\n                 });\n            })( jQuery );\n\n\n        <\/script>\n\n        <div class=\"b-muzzle-energy-calculator\" style=\" \">\n            <h4 class=\"b-muzzle-energy-calculator__title\">Muzzle Energy Calculator<\/h4>\n\n            <div class=\"b-muzzle-energy-calculator_input \">\n                <span class=\"b-muzzle-energy-calculator-icon\">\n                    <svg aria-hidden=\"true\" focusable=\"false\" data-prefix=\"fas\" data-icon=\"balance-scale\" class=\"svg-inline--fa fa-balance-scale fa-w-20\" role=\"img\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 640 512\"><path fill=\"currentColor\" d=\"M256 336h-.02c0-16.18 1.34-8.73-85.05-181.51-17.65-35.29-68.19-35.36-85.87 0C-2.06 328.75.02 320.33.02 336H0c0 44.18 57.31 80 128 80s128-35.82 128-80zM128 176l72 144H56l72-144zm511.98 160c0-16.18 1.34-8.73-85.05-181.51-17.65-35.29-68.19-35.36-85.87 0-87.12 174.26-85.04 165.84-85.04 181.51H384c0 44.18 57.31 80 128 80s128-35.82 128-80h-.02zM440 320l72-144 72 144H440zm88 128H352V153.25c23.51-10.29 41.16-31.48 46.39-57.25H528c8.84 0 16-7.16 16-16V48c0-8.84-7.16-16-16-16H383.64C369.04 12.68 346.09 0 320 0s-49.04 12.68-63.64 32H112c-8.84 0-16 7.16-16 16v32c0 8.84 7.16 16 16 16h129.61c5.23 25.76 22.87 46.96 46.39 57.25V448H112c-8.84 0-16 7.16-16 16v32c0 8.84 7.16 16 16 16h416c8.84 0 16-7.16 16-16v-32c0-8.84-7.16-16-16-16z\"><\/path><\/svg>\n                <\/span>\n                <input id=\"mec-weight\" placeholder=\"Enter Weight (grain)\" type=\"text\" name=\"muzzle_energy_weight\" class=\"b-muzzle-energy-calculator-input-field\">\n            <\/div>\n            <div class=\"b-muzzle-energy-calculator_input \">\n                <span class=\"b-muzzle-energy-calculator-icon\">\n                    <svg aria-hidden=\"true\" focusable=\"false\" data-prefix=\"fas\" data-icon=\"tachometer-alt\" class=\"svg-inline--fa fa-tachometer-alt fa-w-18\" role=\"img\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 576 512\"><path fill=\"currentColor\" d=\"M288 32C128.94 32 0 160.94 0 320c0 52.8 14.25 102.26 39.06 144.8 5.61 9.62 16.3 15.2 27.44 15.2h443c11.14 0 21.83-5.58 27.44-15.2C561.75 422.26 576 372.8 576 320c0-159.06-128.94-288-288-288zm0 64c14.71 0 26.58 10.13 30.32 23.65-1.11 2.26-2.64 4.23-3.45 6.67l-9.22 27.67c-5.13 3.49-10.97 6.01-17.64 6.01-17.67 0-32-14.33-32-32S270.33 96 288 96zM96 384c-17.67 0-32-14.33-32-32s14.33-32 32-32 32 14.33 32 32-14.33 32-32 32zm48-160c-17.67 0-32-14.33-32-32s14.33-32 32-32 32 14.33 32 32-14.33 32-32 32zm246.77-72.41l-61.33 184C343.13 347.33 352 364.54 352 384c0 11.72-3.38 22.55-8.88 32H232.88c-5.5-9.45-8.88-20.28-8.88-32 0-33.94 26.5-61.43 59.9-63.59l61.34-184.01c4.17-12.56 17.73-19.45 30.36-15.17 12.57 4.19 19.35 17.79 15.17 30.36zm14.66 57.2l15.52-46.55c3.47-1.29 7.13-2.23 11.05-2.23 17.67 0 32 14.33 32 32s-14.33 32-32 32c-11.38-.01-20.89-6.28-26.57-15.22zM480 384c-17.67 0-32-14.33-32-32s14.33-32 32-32 32 14.33 32 32-14.33 32-32 32z\"><\/path><\/svg>\n                <\/span>\n                <input id=\"mec-velocity\" placeholder=\"Enter Velocity (feet per second)\" type=\"text\" name=\"muzzle_energy_velocity\" class=\"b-muzzle-energy-calculator-input-field\">\n            <\/div>\n            <div class=\"b-muzzle-energy-calculator_output \">\n                <span class=\"b-muzzle-energy-calculator-description\">Bullet Energy (foot pounds)<\/span>\n                <span id=\"mec-result\" class=\"b-muzzle-energy-calculator-output-field\">\n                    0\n                <\/span>\n            <\/div>\n            <a href=\"#\" class=\"b-muzzle-energy-calculator_action\">\n                <span class=\"b-muzzle-energy-calculator-description\">\n                    <svg aria-hidden=\"true\" focusable=\"false\" data-prefix=\"fas\" data-icon=\"calculator\" class=\"svg-inline--fa fa-calculator fa-w-14\" role=\"img\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 448 512\"><path fill=\"currentColor\" d=\"M400 0H48C22.4 0 0 22.4 0 48v416c0 25.6 22.4 48 48 48h352c25.6 0 48-22.4 48-48V48c0-25.6-22.4-48-48-48zM128 435.2c0 6.4-6.4 12.8-12.8 12.8H76.8c-6.4 0-12.8-6.4-12.8-12.8v-38.4c0-6.4 6.4-12.8 12.8-12.8h38.4c6.4 0 12.8 6.4 12.8 12.8v38.4zm0-128c0 6.4-6.4 12.8-12.8 12.8H76.8c-6.4 0-12.8-6.4-12.8-12.8v-38.4c0-6.4 6.4-12.8 12.8-12.8h38.4c6.4 0 12.8 6.4 12.8 12.8v38.4zm128 128c0 6.4-6.4 12.8-12.8 12.8h-38.4c-6.4 0-12.8-6.4-12.8-12.8v-38.4c0-6.4 6.4-12.8 12.8-12.8h38.4c6.4 0 12.8 6.4 12.8 12.8v38.4zm0-128c0 6.4-6.4 12.8-12.8 12.8h-38.4c-6.4 0-12.8-6.4-12.8-12.8v-38.4c0-6.4 6.4-12.8 12.8-12.8h38.4c6.4 0 12.8 6.4 12.8 12.8v38.4zm128 128c0 6.4-6.4 12.8-12.8 12.8h-38.4c-6.4 0-12.8-6.4-12.8-12.8V268.8c0-6.4 6.4-12.8 12.8-12.8h38.4c6.4 0 12.8 6.4 12.8 12.8v166.4zm0-256c0 6.4-6.4 12.8-12.8 12.8H76.8c-6.4 0-12.8-6.4-12.8-12.8V76.8C64 70.4 70.4 64 76.8 64h294.4c6.4 0 12.8 6.4 12.8 12.8v102.4z\"><\/path><\/svg>\n                    <span>Calculate<\/span>\n                <\/span>\n            <\/a>\n        <\/div>\n\n        <style type=\"text\/css\">\n\n            .b-muzzle-energy-calculator_action {\n                background-color: #e01718;\n                width: 100%;\n                text-align: center;\n                color: #fff;\n                padding: 15px;\n                vertical-align: middle;\n                display: block;\n            }\n            .b-muzzle-energy-calculator_action:hover {\n                background-color: #e04e48;\n            }\n            .b-muzzle-energy-calculator-description {\n                display: inline-block;\n            }\n            .b-muzzle-energy-calculator-description span,\n            .b-muzzle-energy-calculator-description svg\n            {\n                line-height: 24px;\n                vertical-align: middle;\n            }\n\n            .b-muzzle-energy-calculator-description span {\n                padding-left: 10px;\n            }\n\n\n\n            .b-muzzle-energy-calculator {\n                padding-bottom: 15px;\n            }\n\n\n            .b-muzzle-energy-calculator_input {\n                margin-bottom: 15px;\n                display: flex;\n            }\n\n            .b-muzzle-energy-calculator_input input{\n                width: 90%;\n                border-top: solid 1px #e0e0e0;\n                border-right: solid 1px #e0e0e0;\n                border-bottom: solid 1px #e0e0e0;\n                text-align: right;\n                background-color: #F0F0F0;\n                margin-top: 0;\n                margin-bottom: 0;\n            }\n\n            .b-muzzle-energy-calculator_input input.error {\n                border-color: red;\n            }\n\n            .b-muzzle-energy-calculator__title {\n                font-weight: bold;\n                font-size: 26px;\n                padding-top: 30px;\n                padding-bottom: 30px;\n            }\n\n            .b-muzzle-energy-calculator-icon svg,\n            .b-muzzle-energy-calculator-description svg {\n                width: 24px;\n                height: 24px;\n            }\n\n            .b-muzzle-energy-calculator-icon svg {\n                margin-left: auto;\n                margin-right: auto;\n            }\n\n            .b-muzzle-energy-calculator-icon svg path,\n            .b-muzzle-energy-calculator-description svg path {\n               fill: #fff;\n            }\n\n            .b-muzzle-energy-calculator-icon {\n                display: inline-block;\n                background-color: #363b40;\n                width: 120px;\n                text-align: center;\n                padding-top: 10px;\n                padding-bottom: 10px;\n            }\n\n            .b-muzzle-energy-calculator_output {\n                text-align: right;\n                background-color: #F0F0F0;\n                padding: 15px 20px;\n                display: flex;\n                margin-bottom: 15px;\n                color: #e04e48;\n            }\n\n            .b-muzzle-energy-calculator-description {\n                text-align: left;\n            }\n            .b-muzzle-energy-calculator-output-field {\n                text-align: right;\n                font-weight: bold;\n            }\n\n\n            .b-muzzle-energy-calculator_output span {\n                display: inline-block;\n                width: 50%;\n            }\n\n\n            @media (min-width: 460px) {\n\n            }\n\n            @media (min-width: 768px) {\n\n            }\n\n        <\/style>\n\n        \n<h3>Defining Muzzle Energy<\/h3>\n<p>So what is muzzle energy all about and why should you care about a calculator that helps you determine it?<\/p>\n<p>Muzzle energy is the amount of energy a bullet carries right out of the barrel. This number can be used to get a rough idea of a round\u2019s destructive potential. The heavier the bullet and the faster it moves, the higher its muzzle energy.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-large wp-image-4232\" src=\"https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/DSC08337-731x1024.jpg\" alt=\"Ruger American Predator shooting ammunition down range \" width=\"731\" height=\"1024\" srcset=\"https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/DSC08337-731x1024.jpg 731w, https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/DSC08337-214x300.jpg 214w, https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/DSC08337-1096x1536.jpg 1096w, https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/DSC08337-1461x2048.jpg 1461w, https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/DSC08337-scaled.jpg 1827w\" sizes=\"(max-width: 731px) 100vw, 731px\" \/><\/p>\n<p>The more complicated answer: Muzzle energy is the measure of kinetic energy a projectile carries when it exits a firearm. If you can stretch your memory back to high school science, you should remember that kinetic energy is the energy of motion. If an object is moving, it has kinetic energy. In fact, the faster an object is moving, the more kinetic energy it has.<\/p>\n<h3>Muzzle Energy Calculation<\/h3>\n<p>You can calculate kinetic energy using the classic formula you memorized in Physics class. Here it is for those of us who have long since forgotten:<\/p>\n<blockquote><p><em>KE = 0.5 \u2022 m \u2022 v<sup>2<\/sup><\/em><\/p>\n<p><em>where m = mass of object<\/em><\/p>\n<p><em>v = speed of object<\/em><\/p><\/blockquote>\n<p>To translate for the less mathematically inclined, \u201ckinetic energy equals one-half the mass of an object times the square of its velocity.\u201d<\/p>\n<p>The velocity of a projectile plays an important role in the amount of kinetic energy it carries. For example, if you double the velocity of a projectile, the muzzle energy doesn\u2019t just double, it quadruples. To understand this, think about how hard a baseball would hit you when tossed by a four year-old versus its impact when pitched by Randy Johnson. It\u2019s the same projectile, but the speed it travels greatly affects the energy it carries at impact. That\u2019s how velocity affects muzzle energy.<\/p>\n<h3>Measuring Muzzle Energy<\/h3>\n<p>When we talk about muzzle energy, it is typically measured in foot pounds. Foot pounds is a standard unit of energy used as part of the English Engineering Units, a set of measurements commonly used in the United States. One foot pound (sometimes written as ft-lb) translates to the amount of kinetic energy it takes to move a one-pound object one foot.<\/p>\n<p>In old westerns, we often see kinetic energy exaggerated as the bad guy flies backward after being shot. While this seems logical when you look at the numbers, the reality is very different. Even if a cartridge generates 1000 foot pounds of energy, not all of that energy is used to push the target. Some radiates out from the projectile, sending ripples of energy through soft tissue, rather than using all of its force to knock the bad guy backwards into that watering tough or stack of conveniently placed barrels.<\/p>\n<h2>Stopping Power vs. Muzzle Energy<\/h2>\n<p>Gun publications and avid shooters can run on endlessly about the energy of certain cartridges and even specific brands of cartridges. Muzzle energy is often used to rate the lethality of certain loads. Many gun people will even use the term interchangeably with \u201cstopping power.\u201d But is muzzle energy important?<\/p>\n<p>Yes and no.<\/p>\n<p>There\u2019s a lot going on with ammunition. It\u2019s far more complicated than high school math, even if that sometimes feels like the most complicated thing on planet Earth. \u201cStopping power\u201d has plenty more factors than simple kinetic energy.<\/p>\n<h3>What is the Concept of Stopping Power?<\/h3>\n<p><img decoding=\"async\" class=\"size-medium wp-image-3864 alignright\" src=\"https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/20190414_132501_HDR-241x300.jpg\" alt=\"\" width=\"241\" height=\"300\" srcset=\"https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/20190414_132501_HDR-241x300.jpg 241w, https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/20190414_132501_HDR-824x1024.jpg 824w, https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/20190414_132501_HDR.jpg 915w\" sizes=\"(max-width: 241px) 100vw, 241px\" \/>If we are talking about self-defense loads, stopping power is more accurately described as how effectively the round terminates a deadly threat.<\/p>\n<p>In hunting terms, stopping power more accurately refers to killing an animal as quickly and humanely as possible. Believe it or not, these are two very different things.<\/p>\n<p>If you are a hunter, you\u2019ve probably shot an animal that didn\u2019t drop in its tracks. Chances are good that you\u2019ve had to follow a blood trail before recovering game. Although we don\u2019t always like it, a hunter can shoot an animal and let it run off a short distance to expire.<\/p>\n<h4>Self-Defense vs. Hunting Purposes<\/h4>\n<p>Shooters in self-defense situations don\u2019t have this luxury. The goal of an armed citizen is to stop an attacker as quickly as possible. This doesn\u2019t always mean death, and you may not have the luxury of waiting for an armed attacker bent on doing you harm to bleed out.<\/p>\n<p>Causing immediate death with any firearm is difficult and there certainly needs to be an amount of luck on the shooter\u2019s side, especially with the adrenaline and chaos that go with a dynamic situation. This is why soldiers and police officers are trained to aim for center mass, it increases hit probability even though an instant kill is highly unlikely.<\/p>\n<p>Death comes when the brain is deprived of oxygen. For a game animal or a human attacker to die, there must be sufficient blood loss, usually through significant damage to the vascular system or a major blood-bearing organ.<\/p>\n<p>Any bullet that even nicks a vital blood vessel will do the trick. However, death can take anywhere from 10 seconds to a full hour depending on how fast they bleed. If you\u2019ve hit a deer, you can give him ample time to lay down and bleed, tracking a blood trail as necessary.<\/p>\n<p>In a self-defense situation, things tend to happen faster. In just a few seconds, an attacker can carve you up like a Christmas ham and leave you bleeding in the street. That is why the concept behind the term \u201cstopping power\u201d is so important. Stopping the attacker is far more important than killing him. Although death may still come in the end, it isn\u2019t the actual goal.<\/p>\n<h2>Where Does The Energy Go?<\/h2>\n<figure id=\"attachment_4253\" aria-describedby=\"caption-attachment-4253\" style=\"width: 1200px\" class=\"wp-caption alignnone\"><img decoding=\"async\" class=\"size-full wp-image-4253\" src=\"https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/Muzzle-energy-on-the-box.jpg\" alt=\"Hornady 6.5 Creedmoor with the muzzle energy on the box\" width=\"1200\" height=\"779\" srcset=\"https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/Muzzle-energy-on-the-box.jpg 1200w, https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/Muzzle-energy-on-the-box-300x195.jpg 300w, https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/Muzzle-energy-on-the-box-1024x665.jpg 1024w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><figcaption id=\"caption-attachment-4253\" class=\"wp-caption-text\">Many manufacturers, like Hornady, provide the info you need for muzzle velocity right on their ammo boxes.<\/figcaption><\/figure>\n<p>It is ironic in a way that ammunition manufacturers stamp muzzle velocity and muzzle energy on their product packaging. While a good indicator of raw performance, it only gives the consumer a vague idea of how effective that ammunition will be. These numbers only indicate projectile performance as it leaves the muzzle. What matters more is what the projectile does once it strikes the target.<\/p>\n<p><a href=\"https:\/\/www.ammunitiontogo.com\/product_info.php\/pName\/50rds-9mm-luger-winchester-w-train-and-defend-147gr-fmj-ammo\">Winchester\u2019s \u201cTrain and Defend\u201d<\/a> line makes a perfect example. This system pairs range-ready \u201cTrain\u201d rounds that are perfect for practice with \u201cDefend\u201d rounds engineered for terminal performance. The idea is to provide realistic training rounds that deliver the same shooting experience as self-defense rounds. The \u201cTrain\u201d and the \u201cDefend\u201d ammunition produces the exact same muzzle energy and velocity. However, the \u201cTrain\u201d rounds would be a poor choice for loading your concealed carry weapon.<\/p>\n<p>The energy in Winchester \u201cTrain\u201d rounds is sufficient to take down a threat in most defensive situations, the problem is where the energy goes. Topped with <a href=\"https:\/\/www.ammunitiontogo.com\/lodge\/full-metal-jacket-bullets\/\">full metal jacket projectiles<\/a>, Winchester\u2019s training rounds plow through the target. While deep penetration is great for reaching vital organs, too much penetration can cause the bullet to pass completely through the target, taking that energy with it. This is the major problem with using FMJs for anything other than target shooting and recreational plinking.<\/p>\n<p>On the other hand, Winchester \u201cDefend\u201d rounds are topped with <a href=\"https:\/\/www.ammunitiontogo.com\/lodge\/jacketed-hollow-point-bullets\/\">jacketed hollow points<\/a>. Designed to expand, hollow points slow as they move through soft tissue, dumping energy into the target rather than passing straight through. And the expansion does more than slow the progress of the projectile, it also carves a wider wound channel than a comparable FMJ, creating more damage and more blood loss.<\/p>\n<p>Although shooters often argue over how much energy transfer actually matters, in a self defense situation that energy dump could be what stops a perpetrator.<\/p>\n<h2>How Barrel Length Impacts Muzzle Energy<\/h2>\n<p><img decoding=\"async\" class=\"alignright wp-image-3861 size-medium\" title=\"Firing an AR-15 at the range and observing muzzle energy\" src=\"https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/muzzle-energy-ar-293x300.jpg\" alt=\"Firing an AR-15 at the range and observing muzzle energy\" width=\"293\" height=\"300\" srcset=\"https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/muzzle-energy-ar-293x300.jpg 293w, https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/muzzle-energy-ar-1001x1024.jpg 1001w, https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/muzzle-energy-ar-1502x1536.jpg 1502w, https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/muzzle-energy-ar-2002x2048.jpg 2002w\" sizes=\"(max-width: 293px) 100vw, 293px\" \/>Muzzle energy isn\u2019t something that can be measured with radar guns or impact targets. Instead, it is a rather ethereal figure that can only be computed using the previously mentioned formula. Because velocity has such a huge impact on muzzle energy, anything that affects velocity also affects energy exponentially.<\/p>\n<p>As the bullet travels down the barrel, propellant gases build pressure and accelerate the forward motion of the projectile. Once the bullet exits the barrel, the gases dissipate, pressure drops, and air resistance begins to slow the bullet. This is why velocity and energy generated at the muzzle will be the greatest over the course of the bullet travel path.<\/p>\n<p>Generally speaking, the longer the barrel, the greater the muzzle velocity (and thus the greater the muzzle energy) because there is more length for pressure to build before the air creates drag.<\/p>\n<p>Technically this is only true to a point. If the barrel is too long, the friction of the bullet against the interior wall of the barrel will overcome the pressure of the expanding gases, slowing the bullet rather than accelerating it. However, for this to occur, the barrel would have to be impractically long. So for existing firearms, longer barrels equal higher muzzle velocity and therefore increased muzzle energy.<\/p>\n<p>Because the length of the barrel greatly affects both the velocity and energy generated at the muzzle, the figures touted by the manufacturer aren\u2019t precise and certainly won\u2019t be specific to your particularly firearm. However, that doesn\u2019t mean real science and math weren\u2019t used to come up with these numbers. Ballistic specifications for specific cartridges are based on measurements from tests performed using SAAMI specifications. Typically, manufacturers derive these numbers from data gathered using special ballistic test barrels. They perform the tests in a controlled laboratory environment. So, real world performance can vary greatly.<\/p>\n<h2>How to Use Muzzle Energy<\/h2>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-4234 size-large\" title=\"The impact of muzzle energy on a steel target.\" src=\"https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/DSC08339-768x1024.jpg\" alt=\"The muzzle energy of an AR-15 shot means you likely don't want to shoot at steel targets at close range.\" width=\"768\" height=\"1024\" srcset=\"https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/DSC08339-768x1024.jpg 768w, https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/DSC08339-225x300.jpg 225w, https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/DSC08339-1152x1536.jpg 1152w, https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/DSC08339-scaled.jpg 1920w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><\/p>\n<p>Muzzle energy isn\u2019t exactly precise or the most important aspect of ammunition performance. But, it shouldn\u2019t just be tossed aside. It&#8217;s an important piece of the puzzle and shooters who understand ammunition performance can use muzzle energy calculations to their advantage.<\/p>\n<p>For self-defense shooters, knowing the muzzle energy of your practice ammunition and your personal protection loads is important. You want the specs of these two loads to match. This will make the feel and point-of-aim comparable. So, your practice shooting will be similar to what you will experience if you fire your weapon in a defensive situation.<\/p>\n<p>For self-defense and hunting ammunition, muzzle energy is just part of the equation. Sure you want a hard-hitting round to ensure adequate energy transfer and penetration, but you also need to consider bullet design. A lot can happen between the muzzle and target impact. You should carefully consider weight retention and projectile expansion or fragmentation as well.<\/p>\n<p>As always, it\u2019s important to remember that at the end of the day there is no substitution for accuracy. A well-placed shot with less than stellar ammo is more effective on animals, whether fur bearing or criminal, than a poorly placed shot with the best performing ammunition on the market. So spend some time on the range and become proficient with your weapon of choice.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>As gun people, we often become obsessed with ballistic data, particularly with energy and velocity.  It\u2019s easy to understand why we get so deep into the numbers. Muzzle velocity and energy are often stamped right on ammo packaging. Muzzle energy is a prime comparative figure and could be the reason you pick one load over another. In this guide, we&#8217;ll examine why muzzle velocity is important and how you can use it to be a more effective hunter and more prepared self-defense shooter.<\/p>\n","protected":false},"author":12,"featured_media":4257,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[2,3,81],"tags":[128],"class_list":["post-3858","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ammo-topics","category-hunting","category-self-defense","tag-muzzle-energy"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Muzzle Energy Calculator &amp; Guide<\/title>\n<meta name=\"description\" content=\"A look at what muzzle energy is and how it impacts shooting. Plus, check out our free &amp; easy to use muzzle energy calculator.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ammunitiontogo.com\/lodge\/muzzle-energy-calculator\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Muzzle Energy Calculator &amp; Guide\" \/>\n<meta property=\"og:description\" content=\"A look at what muzzle energy is and how it impacts shooting. Plus, check out our free &amp; easy to use muzzle energy calculator.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.ammunitiontogo.com\/lodge\/muzzle-energy-calculator\/\" \/>\n<meta property=\"og:site_name\" content=\"The Lodge at AmmoToGo.com\" \/>\n<meta property=\"article:published_time\" content=\"2019-07-11T15:41:28+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-03-15T14:19:18+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/shooting-at-the-range-muzzle-energy.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1024\" \/>\n\t<meta property=\"og:image:height\" content=\"609\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Alice Jones Webb\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Alice Jones Webb\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"9 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.ammunitiontogo.com\/lodge\/muzzle-energy-calculator\/\",\"url\":\"https:\/\/www.ammunitiontogo.com\/lodge\/muzzle-energy-calculator\/\",\"name\":\"Muzzle Energy Calculator & Guide\",\"isPartOf\":{\"@id\":\"https:\/\/www.ammunitiontogo.com\/lodge\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.ammunitiontogo.com\/lodge\/muzzle-energy-calculator\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.ammunitiontogo.com\/lodge\/muzzle-energy-calculator\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/shooting-at-the-range-muzzle-energy.jpg\",\"datePublished\":\"2019-07-11T15:41:28+00:00\",\"dateModified\":\"2023-03-15T14:19:18+00:00\",\"author\":{\"@id\":\"https:\/\/www.ammunitiontogo.com\/lodge\/#\/schema\/person\/f48aad7ac301e374f881101d36ad6e2e\"},\"description\":\"A look at what muzzle energy is and how it impacts shooting. Plus, check out our free & easy to use muzzle energy calculator.\",\"breadcrumb\":{\"@id\":\"https:\/\/www.ammunitiontogo.com\/lodge\/muzzle-energy-calculator\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.ammunitiontogo.com\/lodge\/muzzle-energy-calculator\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.ammunitiontogo.com\/lodge\/muzzle-energy-calculator\/#primaryimage\",\"url\":\"https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/shooting-at-the-range-muzzle-energy.jpg\",\"contentUrl\":\"https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/shooting-at-the-range-muzzle-energy.jpg\",\"width\":1024,\"height\":609,\"caption\":\"Demonstrating muzzle energy at the shooting range with a pistol\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.ammunitiontogo.com\/lodge\/muzzle-energy-calculator\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.ammunitiontogo.com\/lodge\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Muzzle Energy Calculator &amp; Guide\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.ammunitiontogo.com\/lodge\/#website\",\"url\":\"https:\/\/www.ammunitiontogo.com\/lodge\/\",\"name\":\"The Lodge at AmmoToGo.com\",\"description\":\"AmmoToGo.com&#039;s blog about ammo, guns and shooting. Look for tips for the range here.\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.ammunitiontogo.com\/lodge\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.ammunitiontogo.com\/lodge\/#\/schema\/person\/f48aad7ac301e374f881101d36ad6e2e\",\"name\":\"Alice Jones Webb\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.ammunitiontogo.com\/lodge\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/2e3fa0ef78bf4b6554da0d5a952e40e8269f92a99d6c4892ef577f38e9c51dfc?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/2e3fa0ef78bf4b6554da0d5a952e40e8269f92a99d6c4892ef577f38e9c51dfc?s=96&d=mm&r=g\",\"caption\":\"Alice Jones Webb\"},\"description\":\"Alice Jones Webb is a writer, long-time hunter, experienced shooter, and mother of 4 up-and-coming outdoor enthusiasts. She grew up flinging arrows and bullets at Virginia whitetails, turkey, and game birds, although her favorite hunting experience is chasing bull elk in the Colorado back country. She is also a self-defense instructor and competitive archer. Alice currently resides in rural North Carolina with her children, non-hunting husband, and a well-stocked chest freezer.\",\"url\":\"https:\/\/www.ammunitiontogo.com\/lodge\/author\/alice\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Muzzle Energy Calculator & Guide","description":"A look at what muzzle energy is and how it impacts shooting. Plus, check out our free & easy to use muzzle energy calculator.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.ammunitiontogo.com\/lodge\/muzzle-energy-calculator\/","og_locale":"en_US","og_type":"article","og_title":"Muzzle Energy Calculator & Guide","og_description":"A look at what muzzle energy is and how it impacts shooting. Plus, check out our free & easy to use muzzle energy calculator.","og_url":"https:\/\/www.ammunitiontogo.com\/lodge\/muzzle-energy-calculator\/","og_site_name":"The Lodge at AmmoToGo.com","article_published_time":"2019-07-11T15:41:28+00:00","article_modified_time":"2023-03-15T14:19:18+00:00","og_image":[{"width":1024,"height":609,"url":"https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/shooting-at-the-range-muzzle-energy.jpg","type":"image\/jpeg"}],"author":"Alice Jones Webb","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Alice Jones Webb","Est. reading time":"9 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.ammunitiontogo.com\/lodge\/muzzle-energy-calculator\/","url":"https:\/\/www.ammunitiontogo.com\/lodge\/muzzle-energy-calculator\/","name":"Muzzle Energy Calculator & Guide","isPartOf":{"@id":"https:\/\/www.ammunitiontogo.com\/lodge\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.ammunitiontogo.com\/lodge\/muzzle-energy-calculator\/#primaryimage"},"image":{"@id":"https:\/\/www.ammunitiontogo.com\/lodge\/muzzle-energy-calculator\/#primaryimage"},"thumbnailUrl":"https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/shooting-at-the-range-muzzle-energy.jpg","datePublished":"2019-07-11T15:41:28+00:00","dateModified":"2023-03-15T14:19:18+00:00","author":{"@id":"https:\/\/www.ammunitiontogo.com\/lodge\/#\/schema\/person\/f48aad7ac301e374f881101d36ad6e2e"},"description":"A look at what muzzle energy is and how it impacts shooting. Plus, check out our free & easy to use muzzle energy calculator.","breadcrumb":{"@id":"https:\/\/www.ammunitiontogo.com\/lodge\/muzzle-energy-calculator\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.ammunitiontogo.com\/lodge\/muzzle-energy-calculator\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.ammunitiontogo.com\/lodge\/muzzle-energy-calculator\/#primaryimage","url":"https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/shooting-at-the-range-muzzle-energy.jpg","contentUrl":"https:\/\/www.ammunitiontogo.com\/lodge\/wp-content\/uploads\/shooting-at-the-range-muzzle-energy.jpg","width":1024,"height":609,"caption":"Demonstrating muzzle energy at the shooting range with a pistol"},{"@type":"BreadcrumbList","@id":"https:\/\/www.ammunitiontogo.com\/lodge\/muzzle-energy-calculator\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.ammunitiontogo.com\/lodge\/"},{"@type":"ListItem","position":2,"name":"Muzzle Energy Calculator &amp; Guide"}]},{"@type":"WebSite","@id":"https:\/\/www.ammunitiontogo.com\/lodge\/#website","url":"https:\/\/www.ammunitiontogo.com\/lodge\/","name":"The Lodge at AmmoToGo.com","description":"AmmoToGo.com&#039;s blog about ammo, guns and shooting. Look for tips for the range here.","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.ammunitiontogo.com\/lodge\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/www.ammunitiontogo.com\/lodge\/#\/schema\/person\/f48aad7ac301e374f881101d36ad6e2e","name":"Alice Jones Webb","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.ammunitiontogo.com\/lodge\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/2e3fa0ef78bf4b6554da0d5a952e40e8269f92a99d6c4892ef577f38e9c51dfc?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/2e3fa0ef78bf4b6554da0d5a952e40e8269f92a99d6c4892ef577f38e9c51dfc?s=96&d=mm&r=g","caption":"Alice Jones Webb"},"description":"Alice Jones Webb is a writer, long-time hunter, experienced shooter, and mother of 4 up-and-coming outdoor enthusiasts. She grew up flinging arrows and bullets at Virginia whitetails, turkey, and game birds, although her favorite hunting experience is chasing bull elk in the Colorado back country. She is also a self-defense instructor and competitive archer. Alice currently resides in rural North Carolina with her children, non-hunting husband, and a well-stocked chest freezer.","url":"https:\/\/www.ammunitiontogo.com\/lodge\/author\/alice\/"}]}},"_links":{"self":[{"href":"https:\/\/www.ammunitiontogo.com\/lodge\/wp-json\/wp\/v2\/posts\/3858","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ammunitiontogo.com\/lodge\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ammunitiontogo.com\/lodge\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ammunitiontogo.com\/lodge\/wp-json\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ammunitiontogo.com\/lodge\/wp-json\/wp\/v2\/comments?post=3858"}],"version-history":[{"count":20,"href":"https:\/\/www.ammunitiontogo.com\/lodge\/wp-json\/wp\/v2\/posts\/3858\/revisions"}],"predecessor-version":[{"id":4410,"href":"https:\/\/www.ammunitiontogo.com\/lodge\/wp-json\/wp\/v2\/posts\/3858\/revisions\/4410"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ammunitiontogo.com\/lodge\/wp-json\/wp\/v2\/media\/4257"}],"wp:attachment":[{"href":"https:\/\/www.ammunitiontogo.com\/lodge\/wp-json\/wp\/v2\/media?parent=3858"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ammunitiontogo.com\/lodge\/wp-json\/wp\/v2\/categories?post=3858"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ammunitiontogo.com\/lodge\/wp-json\/wp\/v2\/tags?post=3858"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}