Sierra GameKing Rifle Bullets are sold for use with .22 .30 .243 .264 .284 .270 .284 .338 and other calibers and comes in various grains and diameters. The bullets are affordably priced and tougher than the 165 Spitzer. Designed for seasoned hunters who need an extra margin of performance at long range these bullets boast a boat tail design that creates a distinct advantage. The bullet was designed after the MatchKing 168 grain known as being exceptional. Based on features and construction this bullet has the capability of penetrating deep while producing outstanding expansion when hunting medium game.