This PMC X-Tac Match ammunition was designed with exceptional performance and reliability in mind. PMC X-TAC Match ammunition is the result of combining the quality performance of their X-TAC ammunition line with the world-class ballistics provided by Sierra Bullets. 77-grain Sierra Match Kings have set numerous records worldwide and are regarded as some of the most accurate bullets on this planet. The Matchking is an excellent bullet choice for precision shooting and terminal performance even when fired from short-barreled AR-pistols and SBRs. This ammunition is brass cased, boxer primed, non-corrosive, and fully reloadable. This ammunition will easily shoot sub MOA groups from barrels 16" or longer. If you want to shoot accurate, shoot X-Tac Match.