20rds – 40 S&W Hornady Critical Duty 175gr. FlexLock Ammo

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Hornady Ammunition 175 Grain Jacketed Hollow-Point (JHP) Ammo Details

This 40 S&W cartridge is from Hornady’s Critical Duty line of ammunition, the Nebraska manufacturer’s premier solution for full-size handgun carriers who demand superior barrier penetration without sacrificing knock-down terminal performance. The round’s 175 grain FlexLock projectile sports a patented Flex Tip polymer insert, which prevents clogging of its hollow point altogether and initiates rapid expansion during penetration. The FlexLock’s InterLock band keeps its tough high antimony lead core and notched jacket bound together during penetration, enabling optimal weight retention for a wide and deep wound channel. The FlexLock also sports a cannelure to prevent setback during feeding.

This round has a low flash propellant, so your first shot won’t render you blinded if you must defend yourself in the dark. Its nickel plated brass casing not only facilitates a chamber check in a low light environment, but further increases its lubricity and ability to resist corrosion. Your repeat business is too important to us for you to utilize anything but the most effective personal protection ammo -- invest in Critical Duty!
  • Manufacturer
    Hornady Ammunition
  • Condition
  • Bullet Weight
    175 Grain
  • Bullet Type
    Jacketed Hollow-Point (JHP)
  • Use Type
    Self Defense
  • Casing Type
    Nickel-Plated Brass
  • Quantity
  • Ammo Caliber
    40 Smith & Wesson
  • Manufacturer SKU
  • Primer Type
  • Muzzle Velocity
  • Muzzle Energy
  • UPC Barcode
  • Cost Per Round

Ballistic Gel Testing


As you hunt for the best self-defense 40 Smith & Wesson ammo, we thought you might enjoy seeing the results of some testing we recently conducted with calibrated Clear Ballistics gelatin.

We shot five of these Hornady Ammunition rounds through a four-layer cloth barrier using a S&W M&P40c. The results are detailed in the video you see above as well as the photographs. Through the charts, you should get a great idea how this Hornady Ammunition ammo stacked up relative to other 40 Smith & Wesson ammo products available to American shooters.

To get a better sense of our tests, be sure to check out all the protocols we followed when conducting our tests to determine the best self-defense ammo.

Gel test results for Hornady Ammunition 175 Grain Jacketed Hollow-Point (JHP) ammo

Unfired versus Fired Round Comparison

Image detailing before and after firing 20rds – 40 S&W Hornady Critical Duty 175gr. FlexLock Ammo Image detailing before and after firing 20rds – 40 S&W Hornady Critical Duty 175gr. FlexLock Ammo

How do the results for this Hornady Ammunition 40 Smith & Wesson compare to other 40 S&W?

20rds – 40 S&W Hornady Critical Duty 175gr. FlexLock Ammo Gel Test Results
Bullet Depth (in.) 15.4 16.2 19.3 22.3 23.5
Expanded Diameter (in.) 0.4 0.4 0.47 0.53 0.53
Bullet Weight after shot (gr.) 172.8 174.2 174.4 174.4 174.5
Bullet Velocity (fps) 968 975 976 977 993
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