I had one barrel that seemed to want to give me a light brown stain on the patch no matter what I did. Even though the bore looked smooth and clean with a bore light. In desperation, I gave it a very liberal coat of Montana X-Treme bore conditioner and let it sit. Two day later I ran a patch down the bore and it came out really brown. So I cleaned the bore again with 91% Isoproply alcohol until I got a clean patch. Then applied a light coat of bore conditioner. When I checked it the next day the patch came out clean. It no longer gives me that light stain after cleaning. I believe that conditioner leached out whatever was causing the stain.
Last edited by Semisane; 02-13-2013 at 02:45 PM.