Federal Premium handgun loads are some of the best loads on the market today. HST has been specifically designed to deliver consistent expansion, optimum penetration and superior terminal performance. The Federal HST's primary design feature was to hold together providing a near 100% weight retention while the hollow point secondary function is to ensure that the cavity does not plug up when passing through a variety of barriers. This ensures that when the projectile hit's it's intended target it can still mushroom and expand rather than fail like the competition. The deep penetration of this jacketed bullet satisfies even the Federal Bureau of Investigation's stringent testing requirements.