Sierra MatchKing Bullets 6.5mm (264 Diameter) 150 Grain Hollow Point Boat Tail (100Pk)Sierras pre eminent target bullets. The driving motivation for the design of each MatchKing bullet is accuracy. These bullets have very thin jackets drawn to an exacting concentricity standard, and their weight is held to within 0. 3 grain. All MatchKings have a hollow point design with a very small meplat for high ballistic coefficient. The majority of these bullets have a boat tail shape to further minimize drag and improve ballistic coefficient.