The pictures Ive seen at the Accurate Shooter website looked bad and if it went unaddressed for very long it would defiantly devalue the rifle. As far as black powder I have no idea but due to its corrosive nature I would suspect it could be worse than smokeless. Go to the accurate Shooter website and search for primer leaks or etched bolt face or some thing similar. The bolt action match rifle required machining to fix I can't imagine it would be easy to fix the breech face of a double. Look in to the RCBS die if I haven't convinced you not to use them it may fix them enough to be a none issue. The box says RCBS pocket swager combo #447022. A call to RCBS may be necessary to find out if your cases are too long, and to see if the tech thinks they will do what you need done. Good luck and don't mess up that nice rifle!!!