I would not over look the powder called IMR-4320! It was the one powder that made my 700 REM BDL heavy barrel shoot very very small groups. I used Sierra 85 grain BT bullets back then. The rifle had never shot under a 1 inch group before using this powder bullet combination. I later was able to shoot .325 MOA with that rifle and it would shoot .500 any day, come rain, snow, sleet or sunshine.
