With the jig shown above, I'd expect dinger front sight base, twisted barrel &/or enlarged chember. I learned the hard way, to chuck the barrel in the vise with brass shims, as close as possible to the wrench being used. 30+ years ago, before I had the proper tools, I mounted a 7.65mm 20 commerical barrel in a shop vise at the muzzle end, and found the barrel actually twisted 90 degrees before releasing from the receiver. Fortunately, I was not planning to save the shot out barrel, but would not do it that way again. TH
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