I have been shooting a TC New Englander .50 percussion muzzy for several years. Today when we took her out we experienced misfire with 2 new lots of caps, had been nearly perfect before. When I got home and disassembled the lock, it was dry. You could see where the outside of the tumbler was rubbing against the outside panel. Should I simply use gun oil, or I have some gun grease? Secondly, should I polish out the scratches before reassembly? Thanks in advance for your replies,
Tom