He tried mag primers and the problem was gone. I loaded up a batch which has a 240 grain cast BB semi wadcutter plus a moderate charge of Unique.. The results were being astounding!!! It might just chew out the x-ring. Groups were being below one one/two inches at 50 https://z-ndh-tchen-large-rifle29489.tribunablog.com/detailed-notes-on-large-rifle-magnum-45943158