I picked up my first Montana yesterday. Ran a few wet patches down the bore, mounted a scope and shot some loads I had reloaded for another 243. These are 65gr VMAX. I like them for coyotes.
I got it on paper, then shot a 3-3shot groups. Looks like they are around 1", shot at 100 yards.
Going to dig up, SAS's thread, and maybe try to do a little better.