Sierra MatchKing bullets have very thin jackets and are held to exacting tolerances in diameter and weight. These Hollow Point Boat Tail bullets have a small meplat to produce a higher ballistic coefficient. Their accuracy has been acclaimed worldwide and they have been used to win more target competitions than all target bullets from other manufacturers combined. The 30 Caliber 240 Grain MatchKing was originally developed for use in 300 Winchester Magnum sniper rifles. It requires a 1 in 9" twist as it if difficult to stabilize but proves to be extremely accurate at long ranges with the right load.