The Hornady Critical Duty .40 S&W 175gr FlexLock (brand part no. 91376) carries the heaviest common .40 S&W bullet weight through Hornady’s duty-proven FlexLock design. Hornady builds the bullet around a high-antimony lead core, extremely tough and delivering controlled expansion at a more economical price than similar bonded bullets. A mechanical InterLock band joins the jacket to the core, keeping the bullet from separating and maximizing weight retention through the wound channel. Nickel-plated cases resist corrosion and make low-light chamber checks easier. In handgun ammunition for duty and defensive carry, this is Hornady’s heavier .40 S&W FlexLock option.

Key Specifications

• The chambering is .40 S&W, a proven defensive caliber for compact and full-size pistols.
• The bullet is a 175-grain FlexLock, the heaviest common bullet weight in .40 S&W.
• A mechanical InterLock band keeps the jacket and core from separating, maximizing weight retention on impact.
• The lead core is high-antimony, extremely tough and more economical than a bonded-bullet design.
• The case is nickel-plated brass, resisting corrosion and easing low-light chamber checks.
• Each box holds 20 rounds, a practical amount for practice plus a carry reload.
• Cases ship 10 boxes to a case, a useful bulk option for shooters training with their carry load.
• Cost works out to about $1.48 per round, reasonable for a duty-grade defensive load.
• A cannelured, crimped bullet resists setback during repeated feeding, important for duty pistols reloaded often.

Frequently Asked Questions

Why choose the 175-grain weight in .40 S&W? It’s the heaviest common bullet weight in the caliber, carrying more momentum through the FlexLock’s InterLock design for consistent penetration.

What does the InterLock band do? It’s a mechanical jacket-to-core connection that keeps the bullet from separating on impact, maximizing weight retention and terminal performance.

How many rounds come in a box? Each box holds 20 rounds of .40 S&W, with 10 boxes to a case.

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

Duty and defensive carry both demand a round that holds up to repeated loading and still performs when it counts, and Critical Duty is engineered around exactly that reliability. Carry the load built for the job. Order from our Lubbock, Texas gun shop and it ships fast to your door.