cjmac
Silver $$ Contributor
Well lets say I get a new mk3 in 308 and start loading for it . Has anyone noticed that it likes heavy grain bullets or lighter ones ? It has a 1in12 twist . Most of my 308 that I have like to be around the 2500-2600fps . I will also be adding a aftermarket boss on it if it shoots decent. 1in12 is good for up to a 168 grain bullet . I only want to shoot 150 or 165g for white tail