Hornady SST InterLock Bullets 7.62x39mm (310 Diameter) 123 Grain SST (100pk)Hornady SST Bullets combine proven Hornady performance with a high ballistic coefficient. The sharp, pointed polymer tip creates a fast, flat shooting bullet. The SST features a one piece core and jacket strengthened in critical areas, to deliver controlled expansion and superior weight retention. Featuring Hornady's trade mark InterLock ring system, this bullet's core and jacket remain locked solid during expansion, creating massive wound channels.