I just tore down my 223 Montana that was shooting 1.5 to 2 inches at 100 with most everything, usually 2 touching, one out.
Skim bedded with a tight lug, made sure the barrel floated, reassembled, and got into sub inch territory. Disassembled it again to tweak the trigger, and its back to 1.5 to 2 again. Went back to the start and found I had somehow managed to bind the follower spring under the mag box. I expect it will be back to the sweet spot now. Well worth the effort.
I bought this rifle after finding a 7/08 Montana that behaved itself from the start.
