The Hornady Critical Duty .45 ACP +P 220 grain FlexLock represents the pinnacle of tactical handgun ammunition specifically engineered to meet FBI Protocol requirements for law enforcement and personal protection. This premium ammunition delivers superior "barrier blind" performance through common urban barriers while maintaining consistent terminal performance.Hornady Critical Duty .45 ACP +P 220 Gr FlexLock ammunition20 rounds per boxFlexLock bullet with patented Flex Tip technologyNickel-plated brass cases for corrosion resistance and easy chamber checksLow flash propellant preserves night visionMuzzle velocity: 975 fps muzzle energy: 464 ft-lbsWaterproof sealed primer pocket and case mouthBoxer primers for easy reloadingThe FlexLock bullet incorporates Flex Tip technology to eliminate clogging when penetrating barriers plus an InterLock band that prevents jacket separation for maximum weight retention. Designed for full-size .45 ACP handguns rated for +P ammunition this load excels in self-defense and law enforcement applications where barrier penetration and consistent expansion are critical.