Hi everbody, I'm new to this site and have a question? I am currently shooting my Savage with a 1:24 twist barrel 235gr QT spitzer (PRbullet in Manitoba) with the magnum sub base with 40gr of IMR 4759. 150yds I'm getting consistent 1" groups, but when I go to 200yds the grouping opens up to almost 12". Any suggestions. I've tried the 180grn and the 250grn Deadcenter with the same results. I've switched powder to Accurate 5744 with diff. grainage and the same result.