20rds - 300 Win Mag Hornady 165gr. GMX Superformance Ammo


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Hornady Ammunition 165 Grain GMX Ammo Details

Founded as a simple two-man operation in 1949, Hornady has grown to become a world leader in high performance ammunition. Accurate, deadly, and dependable, Hornady ammunition is motivated by the goal of “Ten bullets through one hole.” Like all Hornady loads, Hornady’s Superformance line is manufactured with only the highest quality components to pack a hard punch on big game animals.

This package contains 20 rounds of Hornady Superformance .300 Winchester Magnum ammunition. Each cartridge is loaded with a 165 grain GMX projectile. GMX bullets deliver deep penetration with a non-traditional, monolithic construction. Using a copper/zinc alloy, GMX projectiles retain 95 percent of their original weight while expanding up to 1 ½ times their original diameter.

GMX bullets also feature a hard polymer tip designed to drive into the hollow cavity at the front of the projectile, initiating reliable expansion without clogging. The result is a devastating mushrooming effect that carves a wide and effective wound channel for quick, humane kills.

This factory fresh ammunition is non-corrosive and boxer primed. Each round features a sturdy and reloadable brass case. Leaving the muzzle at a velocity of 3260 feet per second, these loads deliver an impressive 3893 foot pounds of game-dropping muzzle energy.

  • Manufacturer
  • Condition
  • Bullet Weight
  • Bullet Type
  • Use Type
    Deer Hunting, Elk Hunting
  • Casing Type
  • Quantity
  • Ammo Caliber
    300 Winchester Magnum
  • Manufacturer SKU
  • Primer Type
  • Muzzle Velocity
  • Muzzle Energy
  • UPC Barcode
  • Cost Per Round

Hornady Ammunition 300 Winchester Magnum Ballistic Data

Hornady Ammunition 300 Winchester Magnum Ammo Details

Barrel Length inches
Ballistics Coefficient (G1)
Ballistics Coefficient (G7)
Sectional Density
Muzzle 100 yds. 200 yds. 300 yds. 400 yds. 500 yds.
Velocity fps 3260 3035 2821 2617 2422 2235
Energy ft lbs 3893 3373 2915 2505 2148 1830
Bullet drop inch -1.5 1.1 0 -5.5 -16.1 -32.7

Trajectory Line Graph Hornady Ammunition 300 Winchester Magnum

Velocity / Energy Comparisons


Reviews Leave a Review
  • ☆☆☆☆☆

    posted on by Curtis P

    I’ve had the same issue very dirty,but as long as yo clean your barrel awesome Round,accurate,great knock down power.

  • ☆☆☆☆☆

    posted on by Jeremiah G

    Love the way this bullet shoots out of my savage 116. It is however one of the dirtiest rounds I've ever shot. After 5 rounds my barrel looks like it's been coated in mud! Very accurate bullet however.

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