Accurate reloading data are crucial when working with the 308 7.62x51 cartridge and 168 grain Sierra MatchKing bullets . Always consult multiple manuals such as Hodgdon propellant guides to confirm safe https://montyqraj033594.tinyblogging.com/h3-reloading-data-for-308-winchester-with-168gr-smk-projectiles-85378654