SIERRA TIPPED GAMEKING 6.5MM (0.264") POLYMER TIPPED BOAT TAIL RIFLE BULLETS You asked for it, so Sierra has provided it. 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