In may old super disc I have had no primer stick at all the breech plug is setup for CCI209M primers and have shot loads up to 135gr BH and a 200gr bullet but when shooting a 260gr bullet and 125gr BH the primer cap leaked and that's with a new vent liner and the primer came out fine never had a stick. just to much pressure. will have to see what the new 1-20 dose with the CCI209M breech plug setup for that primer.