i got somecva sidelocks that use a small pistol primer.....they are not as hot as a shotgun primer.......i got my huntsman barrel used never even tried to get plug out.....just clean it like it was a old ft stuffer,,,,,no problems ....i use old <<5 year old >>> cci primers that had a waterproof sealant on them....it always seams to rain during bp season ,so i want the hottest fire i can get........jb