In 2013, Federal Premium opted to make law-enforcement's top duty round available to the public and thereby created the HST. This year they added .380 Auto to the line. Federal Premium's engineers worked to give its HST ammunition consistent expansion, optimum penetration, and a terminal performance that makes micro-size handguns an even stronger choice for personal defense. Federal Premium says its 99-grain bullet is "a specially designed hollow point" and its "jacket and core hold together to provide almost 100 percent weight retention." A box of HST .380 Auto retails for $25.95.