M
mike in co
Guest
Bear with me.
1. Here is a test I did over 5 years ago. I coated 10 bullets with moly. I cleaned 5 of them immediately. The moly would come off with water, and completely off with soap & water. The other 5 I let sit a week. The moly would not come off. So all the tests that are applied soon after the moly is applied may be invalid for moly that has sat awhile.
2. As you might suspect, I shot moly in my long-range rifles for a while. I had build up (for whatever reason), and decided to stop shooting it. Cleaned as usual. It took about fifty rounds of naked bullets, and the barrel shot as well as ever with bare bullets -- maybe a little better. Using a borescope, the gray/black color you get in the bore with moly never did come completely out, even 700 rounds later when the barrel was at the end of its competitive life. Didn't matter.
This, of course, is anecdotal. I would try what Donovan has suggested (except you can't go back & clean), and if the bore is still gray, don't worry about it. After a good cleaning, whatever remains won't affect your grouping after 20-50 rounds.
FWIW
charles the build up was carbon.....it has to be removed in a seperate step at the begining of cleaning. the moly coating insulates the powder from the bbl and as it burns it cooks carbon on the surface of the moly. easy to remove with a quality carbon remover. then patch out any copper, and go back to shooting...
mike in co