The traditional, flat base design of the Pro-Hunter has been skillfully blended with Sierra's world-famous accuracy. The custom-tapered Pro-Hunter jacket design helps assure maximum expansion, optimum weight retention and deep penetration for game-stopping, 1-shot performance. The 25 Caliber 100 Grain Pro-Hunter performs best on medium sized game at distances under 300 yards. It may also produce slightly better penetration than the 100 Grain GameKing of the same caliber. This is not loaded ammunition.