Hornady Critical Duty 10mm Auto 175gr FlexLock ammunition in a box of 20 rounds (Hornady part no. 91256) 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 5-inch test barrel at 1160 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 10mm Auto, 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 1160 fps from a 5-inch test barrel, per the table on the Hornady product page.
• Muzzle energy is 523 foot-pounds from the same 5-inch test barrel.
• At 100 yards Hornady lists 990 fps and 381 foot-pounds for this load.
• Box quantity is 20 rounds, listed by Hornady as 20 per box.

Frequently Asked Questions

What does the FlexLock bullet do in this 10mm Auto 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 velocity and energy does Hornady list for this 10mm Auto load? Hornady lists 1160 fps and 523 foot-pounds at the muzzle from a 5-inch test barrel, and 990 fps with 381 foot-pounds at 100 yards.

Is it easy to check the chamber in low light? Hornady uses bright brass-plated cases so chamber checks are simpler in reduced light, and loads all Critical Duty ammunition with low-flash propellant to help preserve night vision.

Buy the Hornady Critical Duty 10mm Auto 175gr FlexLock Handgun Ammunition, 20-Round Box

Each box holds 20 rounds, so match the count to how much you plan to shoot or carry. Order it from our Lubbock, Texas gun shop for fast, insured shipping, and browse more handgun ammunition while you are here.