Have you thought about putting a card wad between the buck and the ball? Like an overpowder wad? I am sure that things did happen with the thin barrels made or questional iron back in the days. However, today, the barrels are much thicker, and made of stronger allow steels. I don't think the steel is going to give into any lead projectile, assuming you use reasonable powder charges. I think the problem comes in when modern shooters want to make a cloth or paper cartridge for buck and ball just as they see pictured in certain books, and somehow improve their chance of hitting something beyond 50 yards. The opposite is true, but everyone thinks they can invent the wheel! Its been done, already, but that doesn't seem to stop every newbie with his first ML whatever from thinking he can shoot it faster, or with more power if only he loads it "better" than all of old dummies do! After all, what do we know about anything? Most of don't even own a Blackberry, and some of us think I am talking about the fruit!