Sierra is pleased to introduce the newest member of our MatchKing line; the 30 caliber 125 grain HP MatchKing. This uniquely designed flat based bullet was designed in conjunction with AAC (Advanced Armament Corporation) and Remington Arms for the new .300 AAC Blackout cartridge designed for the AR platform. This bullet has also proven to be exceptionally accurate in bolt action rifles and other .30 caliber AR chamberings. The jacket was specifically designed to handle velocities ranging up through common .30 caliber midlevel cartridges. The #2121 will be available for sale in Jan 2012.