Achieving consistent accuracy with your .308 Winchester rifle often involves careful load development. This guide focuses on pairing the popular Sierra 168-grain SMK projectile with H4350 propellant . https://n570powderreview078375.eveowiki.com/2622792/fine_tuning_308_ammunition_hornady_one_hundred_sixty_eight_grain_projectiles_with_powder_h4350_powder