ORIGINAL: Underclocked
Phil, the JB will turn black with friction (and it will also make brass/bronze bristles turn black). I don't know what your goal was - whether just a good cleaning or you were attempting to lap rough spots from the new barrel - but you succeeded in giving the bore a good cleaning. To try to lap out rough spots would require many more strokes made fast, long, and smoothly. 200 such stokes would probably gain you something in that regard but I would go no further than you already have with a new barrel - the thing may shoot great now.
I was just trying to get a good polish on the bore, i guess. Really, I don't know what I am doing at all on this but I've read some positive comments on doing this in the beginning to speed up breaking in the bore. After your comments I decided to run a cotton ball through the bore. There was only one snag about a 1/3 the way down from the muzzle which seems pretty good to me.
I did stroke the compound pretty much in a steady in motion all the way down, then all the way out each time. I might have done it more slowly than I should have, I used a T-handle with the ramrod.The boreseems pretty smooth and I'm looking forward to checking to see if some ballets take out that snag. We just are notthawed out completely and the range is still closed. Thanks for the input. If the ballets don't take that last burr out, should I go after that last spot as you described? How many conicals should I shoot before considering additional treatment?
Thanks