I recently came upon a Remington 1903-A3 with a 2-groove barrel that is fairly pitted mostly from about a foot in front of the chamber to the muzzle. The rifling grooves are well defined and are pitted in the grooves and on the lands. I haven't shot the rifle yet because I am still cleaning out what I guess is the copper. I've been using Gunslick foaming bore cleaner and the patches came out pure blue with blue syrup pouring out in front of the patch after leaving the foam in the bore for 30 minutes at a time. I have foamed/patched the bore 12 times and the patches are still somewhat blue although not near as blue as the first 7 or so.
My question is.... Is the blue patches still an indication of copper still buried in the pits?
My last session i used Sweets 7.62 a couple of times (still blue patches) and the bore foam again after that. Then I used Kroil and bore brush and then Kroil and JB bore paste. Patches still coming out nasty brownish black. Then I foamed the bore again and voila! A blue patch again LOL............Any advice short of a foul-out machine?
Thank you,,,,,,,,,,,,,,,,Bob