I recently got my 22-250 A.I. back from the gunsmith. I fireformed 40 pieces of Norma brass with the rifle. I neck sized and loaded all the brass again. At this point, everythimg chambers fine. After shooting and neck sizing this time, the brass will chamber but it is very hard to cam the bolt closed. I am using a Redding Competition Bushing neck die set. Any thoughts or ideas you could give the new novice here?