Critical DUTY handgun ammunition is built to meet the needs and requirements of LAW ENFORCEMENT and TACTICAL PROFESSIONALS as well as those law abiding citizens who prefer a full-size handgun for their personal protection and demand superior barrier penetration and subsequent terminal performance.* The FlexLock bullets loaded in all Critical DUTY offerings are rugged heavy jacketed bullets that deliver virtually "barrier blind" performance (i.e. total penetration weight retention and expansion are practically the same when shot through common urban barriers* (bare gelatin auto glass sheet metal plywood drywall heavy clothing*. In addition Critical DUTY loads are "full power loads" designed to function full-size handgun slides. Although designed to work flawlessly in ALL handguns these loads are NOT optimized for short barreled concealed carry style handguns; they will deliver standard recoil during firing. *As defined by the "FBI Protocol" handgun ammunition tests.