Achieving consistent accuracy with your 308 caliber rifle often copyrights on carefully optimized ammunition. Many shooters find excellent results using a SMK 168-grain projectile paired with IMR 4350, https://elijahwcma314581.wikijm.com/2464763/fine_tuning_308_caliber_recipes_smk_168_grain_with_h4350_44_grains_of_powder