The Hornady FlexLock® Critical Duty® 10mm Auto 175-Grain Handgun Ammunition features a FlexLock® design with a Flex Tip®. Cannelured construction with crimped cases minimizes setback during feeding. High-antimony lead cores. Hornady FlexLock Critical Duty 10mm Auto 175-Grain Handgun Ammunition - 20 Rounds - Pistol Shells at Academy Sports