Just purchased an Old Model .22, 9 1/2" Single Six Barrel that has a ring bulge in the center, just ahead of the ejector rod housing screw. You can feel it and barely see it on the outside. its shows as a shadow inside the bore. other than this its in good shape. I bought it to restore a Single Six I have that was originally a 9 1/2' , but had been cut down by a previous owner, who did a very nice job. I suppose I could look for the perfect barrel, and may. None the less, are there any concerns I should have about using this barrel as is? I'm guessing that its location shouldn't really affect accuracy. I would appreciate your thoughtful advice. I plan to swap barrels myself, and found a great guide for this (which I printed) in this forum by Jim. Thanks for your assistance, Pat