I blew the nipple out of a percussion Great Plains Rifle last fall. The gun is 30 some years old. I'm trying to figure out a way to repair the barrel. It appears the threads wore out but it enlarged the hole as it blew out. I contacted both Track of the Wolf and Dixie Gun Works and their thoughts were to either recut larger threads for an oversized nipple or force fit a titanium nipple which would create a new thread hole in the barrel. Neither idea worked. The titanium nipple was good for two shots and then it blew out as well. I have a spot welding guy looking at it now, but he is still "scratching his head" over it. Any ideas?