Hornady® Critical Duty® 9mm 135gr FlexLock® Duty is a performance-enhanced centerfire pistol round, featuring a patented FlexLock® Flex Tip® bullet with a heavy-duty jacket-to-core InterLock® band for devastating expansion and maximum penetration for superior stopping power on advancing threats. Nickel-plated brass casings offer smooth operation and improved feeding performance, and the matched powders and primers ensure optimal pressure, velocity, and consistency for superior reliability in the field. Plus, this ammo features a high-antimony lead core, designed to deliver controlled expansion and maximum weight retention for unparalleled terminal and barrier penetration.