Ok I've found the sweet spot for my Rem 700 338 RUM with the 300g SMK's at least, but I'm having some trouble. The 225g and 250g bullets work well, but when I step up to the 300g bullets I can't keep the scope off my head. I built the rifle to be a light mountain rifle and it tips the scales right at 9.5lbs with scope. Any suggestions? I don't want to brake it if I can help it. I guess the good news is that the last group I printed with it was 7/16" @ 100 yards with the 300g SMK's, which I am very happy about. Thanks in advance fot the help