Have you tried pushing Un-primed case into the breach with a bullet in the case close the bolt then open it push the bullet back out with a cleaning rod then push in in a couple of tho ----my book says col 2.260"---I load my .223 with 24.5grns of ramshot "tac" col 2.224" this works for me with sub inch groups I have also used 22grn of tac for sub 50yard rounds