Using only match-grade bullets, Premier Match ammunition employs special loading practices to ensure world-class performance and accuracy with every shot. Sierra MatchKing's are super-accurate bullets with very thin jackets and are held to exacting tolerances in diameter and weight. Their accuracy has been acclaimed worldwide and they have been used to win more target competitions than all target bullets from other manufacturers combined. This ammunition is new production, non-corrosive, in boxer primed, reloadable brass cases.