Sierra's new 140gr Tipped GameKing is designed for hunting from today's newer cartridges using a 1-8" twist. Expansion is enhanced by the tip and penetration is regulated by the thick jacket, giving spectacular results on a wide variety of game animals. Game from the size of whitetail to possibly elk and a multiple of bears in-between could be easily taken. This bullet requires a barrel twist rate of 1A-8" or faster. Mfg: Sierra Bullets