Copy that Mel. Yep....most of the 742's, I get in have just been neglected, from season to season. Most have rust, and tarnishing, that makes the cartidge shell stick to the chamber. I have not had any that have been pitted as bad as what you describe. Not sure how I would deal with one of those, if it came into the shop. Short of a barrel replacement...he.e..e.e. Problem with the 742's is to do a proper cleaning job, you have to remove the barrel, and brush out, and polish the chamber when they get to hanging up, (jamming). Most folks are not interested in getting that far into one. After I do my little proprietary process, I always recommend they invest in a Hoppes, Bore Snake, caliber specific, and follow mfg. directions. One extra tip I tell them, is after a few pull throughs with the bore snake, dip the last inch or so of the snake in Kroil, and let it soak in, then do a few pull throughs. It will leave a film of protective oil preservative in the chamber bore, and be ready for next season. There is a ba-jillion 742's out there, and your gonna run up on this problem sooner or later in you shop. This is what works for me. Have had not complaints as of yet! he.e..e.e.e..talk soon. Jeb.