The Sierra MatchKing 22 Caliber (.224") 77 grain HPBT bullets are specifically designed for Service Rifle competition in M16A2/AR-15A2 platforms and have set an incredible number of new national records.Sierra MatchKing 22 Caliber (.224") 77 grain HPBT bulletsBox of 500 bullets for competitive shootersOptimized for M16A2/AR-15A2 Service Rifle competitionAllows seating to OAL compatible with M16/AR15 magazinesRequires barrel twist rate of 1x8" or fasterWorld-renowned for record-setting accuracyHollow Point Boat Tail design for superior ballisticsRecognized globally for their exceptional accuracy in competitive shooting applications. Note: Not recommended for most hunting applications due to design characteristics optimized for target competition rather than reliable expansion.