Yeah, one full turn is a lot. Maybe come back out to where you had it closing really tight, and turn it an eighth of a turn. Then another eighth if needed. It probably won't take much more than that if was actually closing, just closing really tight. You only want to bump the shoulder enough to chamber the round smoothly. Anymore than that and you're overworking the brass. It grows a lot each time you fire it, then you shrink it way back down when you size. As was said above, you only wanna bump the shoulder .001-.002".