Description
Hornady Critical Duty ammunition is built for serious self-defense and personal protection. This isn't range ammo with a fancy name; it's purpose-designed by Hornady with input from tactical professionals and then tested through the FBI's stringent protocol. The 175-grain load launches at 1010 fps with 396 ft-lbs of energy, giving you a balanced platform that works across various full-size handgun platforms.
FlexLock Design Meets Real-World Barriers
The secret sauce is Hornady's two-part bullet technology. The patented Flex Tip design prevents the polymer tip from getting blocked when the round passes through common urban barriers like plywood, auto glass, or sheet metal. That "barrier blind" performance means the bullet stays predictable regardless of what's in the way. The heavy-duty jacket-to-core InterLock band mechanically locks the projectile together, which prevents the jacket from separating during expansion. You get maximum weight retention and consistent terminal performance instead of a bullet that falls apart and loses effectiveness.
Practical Details for Duty Use
These rounds come loaded in nickel-plated brass that's easy to spot-check in dim lighting and feeds smoothly through your firearm. The crimp is tight enough that you won't have bullet setback during feeding. Low-flash propellant helps preserve your night vision if you ever need to fire in low-light conditions. The ammunition is loaded to strict tolerances because it was originally designed for law enforcement duty, so consistency from round to round is built in from the start.
Key Specifications
- Caliber: .40 S&W
- Bullet Weight: 175 grains
- Bullet Type: FlexLock polymer-tipped
- Muzzle Velocity: 1010 fps
- Muzzle Energy: 396 ft-lbs
- Case Material: Nickel-plated brass
- Primer: Boxer
- Reloadable: Yes
- Rounds Per Box: 20
- Manufacturer: Hornady Manufacturing
- Model: Critical Duty
- Manufacturer Part Number: 91376
- UPC: 090255913767
What’s Included
- 20 rounds of Hornady Critical Duty .40 S&W 175gr FlexLock ammunition
Frequently Asked Questions
What makes the FlexLock bullet different from standard defensive rounds?
Hornady's FlexLock combines two key features. The patented Flex Tip prevents clogging when passing through barriers like glass or metal, while the mechanical InterLock band keeps the jacket and core locked together during expansion. This gives you consistent, predictable performance whether or not there's an obstacle in the bullet's path.
Is this ammo suitable for practice at the range?
While technically possible, this ammunition is designed and priced for duty and self-defense use rather than range practice. For everyday shooting, you'd typically want to use less expensive target loads to preserve your supply of this premium defensive ammunition.
Does the nickel-plated brass offer any advantage over standard brass?
Yes, the nickel plating resists corrosion and makes the case highly visible, which helps with quick chamber checks in low light. It also improves feeding reliability through various handgun platforms due to the smoother surface.
What does "barrier blind" performance mean?
Barrier blind performance means the bullet maintains predictable expansion and penetration characteristics regardless of what barrier it passes through first, whether that's auto glass, sheet metal, or heavy clothing. The FlexLock design ensures the bullet performs consistently in real-world scenarios where obstacles are common.







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