The Critical Duty 357 Sig meets FBI established protocol standards for penetration and terminal performance through all FBI test barriers. The FlexLock bullet features the Hornady exclusive Flex Tip technology that enhances barrier protection and prevents clogging, for terminal performance. A massive jacket-to-core InterLock band locks the jacket and core together for high weight retention. Plus, the Critical Duty line features low-flash propellants and nickel-plated cartridge cases with sealed primers and case mouths.