Prior to closing my company, I had 20+ Highly qualified welders, performing everything from Sub-Arc, to GTAW (Tig) At lunch time I would get some of the guys to teach me at the various methods. Actually doing it was more difficult than writing the procedures. I am confident that you have many good aircraft welding shops in FL. Take your barrels, have them make a solid copper or Bronze mandrel, and reform the bent material back into shape. Damascus is very ductile. Them have them weld it, do a low temperature stress relief, then ream the bore and drawfile it out. You'll never fully hide the repair, but you'll be back to where you were.
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