Hornady Critical Duty .357 SIG 135gr FlexLock ammunition in a box of 20 rounds (Hornady part no. 91296) is built for duty and defensive use. The 135-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. 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. It leaves a 4-inch test barrel at 1225 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 .357 SIG, the chambering this Critical Duty load is made for.
• Bullet weight is 135 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 1225 fps from a 4-inch test barrel, per the table on the Hornady product page.
• Muzzle energy is 450 foot-pounds from the same 4-inch test barrel.
• At 100 yards Hornady lists 1031 fps and 319 foot-pounds for this load.
• Box quantity is 20 rounds, listed by Hornady as 20 per box.

Frequently Asked Questions

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.

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.

What velocity and energy does Hornady list for this .357 SIG load? Hornady lists 1225 fps and 450 foot-pounds at the muzzle from a 4-inch test barrel, and 1031 fps with 319 foot-pounds at 100 yards.

Buy the Hornady Critical Duty .357 SIG 135gr FlexLock Handgun Ammunition, 20-Round Box

This item is a single 20-round box of the load described above. Order it from our Lubbock, Texas gun shop for fast, insured shipping, and browse more handgun ammunition while you are here.