Well I recently acquired a new addition to my rimfire family, a 1980 vintage (serial # verified) Thompson Center Contender sporting a nice octagonal 10″ .22 LR barrel. Upon my pre-purchase inspection I noted it had some fouling or debris in the barrel but the best I could tell not too bad. The fore end has a few dents but no gouges or scratches so I went forward with purchasing it. Upon arriving at home it was time to give her a good cleaning. I proceeded to pull a bore snake through the barrel and had to struggle to get it through. The second pass was easier but a visual inspection thereafter revealed some stubborn residue. I almost began to panic as I felt I may be looking at pitting which would have made me quite distressed. After two good scrubs with ballistol and a bore brush the barrel came out clean as a whistle! I was relieved to say the least. I haven’t been out to shoot her yet but will update when I do.