Of greater import is the deeper seating of bullets in magazine rounds. In loads that do not fill the case, that is. Found that out using W 760 and 300-grainers in my .375 Weatherby. No bueno!!
I put a pretty heavy crimp on my round that crimps the brass into the crimp ring on the nosler bullet. Havent had any issues with bullet seating deeper from the recoil. On a side note, have noticed a little better consistency on the velocity since starting to crimp these rounds.
