I've used IMR 4350 and RE-19 with a 225 Hornady and a 250 Sierra BTSP with reasonable groups. 1.5 MOA or less.
My best accuracy has come from more moderate loads with IMR 4895 and the same two bullets, holding very close to 1 MOA out to 200 yards.
My rifle, BTW, is an Encore with a Fox Ridge bull barrel.
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