Hornady Critical Duty Ammunition offers Law Enforcement, Tactical Professionals and those looking for a great personal protection round ammunition that won't let them down. This ammunition incorporates two revolutionary Hornady Features combining them into one great bullet the FlexLock. The FlexLock bullet combines a Flex Tip bullet which initiates consistent expansion while preventing clogging, and the InterLock band which locks the jacket and core together preventing separation and ensuring maximum weight retention. This bullet has proven terminal performance through ALL FBI test barriers every single time. The core on this revolutionary bullet is made of high-antimony lead alloy making it tough, delivering controlled expansion and loaded in nickel plated cases to help prevent corrosion.