Hornady Critical Duty 10mm 175gr FlexLock

Hornady Critical Duty 10mm 175gr is the duty-grade alternative to Federal HST and Speer Gold Dot, built around Hornady's FlexLock bullet design. The bullet uses two patented features: a polymer "Flex Tip" insert that fills the hollow point cavity (preventing it from clogging when passing through heavy clothing or drywall), and an InterLock mechanical band that locks the jacket to the core to prevent separation through barriers.

At 1,160 fps and 523 ft-lbs of energy, it sits between the heavy 200gr HST/Gold Dot loads and the lighter higher-velocity defensive offerings. The 175gr weight is the same loading philosophy Hornady uses in the FBI 9mm Critical Duty contract round (135gr +P), where bullet weight and velocity are balanced for barrier-blind performance rather than maximum expansion. Bright nickel-plated cases simplify chamber checks in low light, and the propellant is low-flash to preserve night vision.

This is the load to choose if you're prioritizing barrier penetration (vehicle defense, shooting through cover) over maximum expansion in soft tissue. It's also a strong choice for shooters who want a more compact, lower-recoil defensive 10mm than the 200gr loads, since the lighter bullet produces noticeably less felt recoil from compact frames like the Glock 29.