I have successfully welded two sets of barrels that were cracked. The big difference was that both were cracked on the muzzle end. At the risk of sounding arrogant I am as good as anybody with a TIG torch and I have 25 years of experience and I don't think I would ever attempt to weld a chamber. Besides being extremely difficult I don't think it would be safe. If there is somebody out there doing it I'd love to learn their technique.

Bill G.