Hornady Critical Duty .40 S&W 175gr FlexLock ammunition in a box of 20 rounds (Hornady part no. 91376) is built for duty and defensive use. Hornady aims Critical Duty at shooters who need superior barrier penetration from a full-size handgun, and reports consistent performance in FBI tactical handgun ammunition tests. The 175-grain FlexLock bullet pairs Hornady’s patented Flex Tip, which eliminates clogging, with a heavy InterLock band that keeps the jacket and core from separating. It leaves a 4-inch test barrel at 1010 fps, and the bright brass-plated cases make a chamber check easier in low light. Low-flash propellant is loaded in every round to help preserve night vision.

Key Specifications

• Caliber is .40 S&W, the chambering this Critical Duty load is made for.
• Bullet weight is 175 grains, the weight Hornady lists for this load.
• The bullet is the FlexLock, which pairs the Flex Tip with an InterLock jacket-to-core band for weight retention.
• Cases are brass-plated and crimped, which resists corrosion and makes chamber checks easier in low light.
• The propellant is low-flash, which Hornady loads in all Critical Duty ammunition to help preserve night vision.
• Muzzle velocity is 1010 fps from a 4-inch test barrel, per the table on the Hornady product page.
• Muzzle energy is 396 foot-pounds from the same 4-inch test barrel.
• At 100 yards Hornady lists 899 fps and 314 foot-pounds for this load.
• Box quantity is 20 rounds, listed by Hornady as 20 per box.

Frequently Asked Questions

What velocity and energy does Hornady list for this .40 S&W load? Hornady lists 1010 fps and 396 foot-pounds at the muzzle from a 4-inch test barrel, and 899 fps with 314 foot-pounds at 100 yards.

What does the FlexLock bullet do in this .40 S&W load? It combines the patented Flex Tip, which eliminates clogging and aids expansion, with an InterLock jacket-to-core band that helps the bullet and core stay together for weight retention. Hornady reports consistent performance in FBI tactical handgun ammunition tests (FBI Protocol).

What is the Critical Duty line built for? Hornady designed it for shooters who want superior barrier penetration from a full-size handgun, with FlexLock bullets that deliver barrier-blind performance through common urban barriers.

Buy the Hornady Critical Duty .40 S&W 175gr FlexLock Handgun Ammunition, 20-Round Box

The 20-round count is the quantity you receive. Order it from our Lubbock, Texas gun shop for fast, insured shipping, and browse more handgun ammunition while you are here.