The Hornady InterLock bullet is designed to be a devastating hunting bullet and nothing less. The InterLock Ring, a Hornady exclusive, ensures that the hard-alloyed lead core and tapered jacket remain locked together during expansion. The resulting bullet retains more mass, energy and momentum after impact and transfers that energy into the target. It is this reliable stopping power that has earned the InterLock a worldwide reputation as a bullet for the serious hunter. This ammunition is new production, non-corrosive, in boxer primed, reloadable brass cases.