Having trouble with a rebarreled Remington 700. Went from 22/250 to 220 swift and having trouble trying to chamber rounds. Seems to me the semi rim is catching on the case below.....rim on top falls behind the rim underneath. We have tried a little filing on the 22/250 follower with slight improvement but definitely not good enough. This is a calling rifle so don't want to go single shot. Any help appreciated