Federal Premium Hydra-Shok has proven itself for self-defense since 1989. Hydra-Shok Deep builds off the time-tested platform with design improvements that better meet modern performance measurements. The bullet features a more robust center post and a core design that penetrate to optimal depths through the barriers most commonly encountered inself-defense situations. This ammunition is new production, non-corrosive, in boxer-primed, reloadable nickel-plated cases. FeaturesHits optimum penetration depths through barriers encountered in self-defense situationsIconic center post design has been improved for better, more consistent expansionSpecially formulated propellantExtremely reliable primerFirst expanding 380 Auto to consistently penetrate beyond FBI - recommended 12-inch minimum in bare gel and through heavy clothing