Achieving consistent accuracy with your .308 Winchester rifle often involves meticulous load development. This guide focuses on combining the popular Sierra 168-grain SMK projectile with H4350 propellant . https://loads-for-h4350-powderi504721.wikitelevisions.com/10054088/fine_tuning_308_caliber_ammunition_hornady_168_grain_smk_with_h4350_gunpowder