howa 1500 in .300 problems
I reside in the RSA and have managed to get my hands on a howa 1500 in .300 winmag early this year. I have put about 200 rounds through it already but been battling a bit to get good groupings iv tried a number of factory loaded rounds and an entire assortment of my own hand loads but still I can't group less than about 6 inches. If there are any other owners out there what will be able to help load data or COL or offer suggestions it will be greatly appreciated.
I'm loading with s365 behind a 180gr sierra game king spbt with a winchester magnum primer in the rear
S365 with a 165gr barns sp also with a winmag primer