I pored my first boolits last night sized em today. Made up a few dummy rounds to check what size and OAL combo would work in my M&P Pro. I think the casting gods where smiling on this noob cause with the boolit sized to .3575" the shoulder of the wadcutter part of the boolit just kissed the rifling at listed max OAL of 1.169". I'm really happy cause this sucker is long at .710" and I'll take all the case capacity I can get! And the dummy feeds and extracts without issue and there is room to spare in the mag.