It’s not really a buildup, more like a thin smeared on coating. I did shoot about 40 rounds of copper plated through both of the pistols I’m using and had no issues, but it had no effect on the coating in the bore at all. I know it’s not lead, I’ve cleaned enough of that out of magnum revolvers over the years and tried the copper chore boy on this as well. When I talked to them at BC Steve said the slight coating left behind shouldn’t hurt anything and so far this seems to be the case.just be careful, enough of that stuff builds up and you could end up with a bore obstruction and a kaboom. firing jacketed after is inadvisable, or so I have been told.
This is what I’m afraid of, I don’t want to ruin my guns because of this issue. I tried some paint stripper this morning but it had absolutely no affect on it whatsoever. So far the only thing that’s helped a little has been soaking it in acetone with both ends of the barrel plugged.This section of the link offered by Mike38 poses a question related my previously described experience:
"Our customers have fired thousands of rounds through various guns without ever cleaning the bore, or needing to. When you use our bullets and the right load combination, you'll be surprised at how clean the bore stays. Run a dry patch or two through it after use and you might never need to do anything else. You can brush the bore with a brass brush, but this is usually unnecessary."
If I run a dry patch through any of my guns after firing, the patch will be black to some degree, due to carbon from powder burn. If this coating is moly, that, too, imparts a black coating on the patch. That one "might never need to do anything else" raises the question of what might one need to do? And what is expected of the use of a brass brush?
"For these reasons, one of the biggest advantages of using BCS bullets is cleanliness. Clean to handle, clean to load, clean to use. The small amount of black you get on your fingers is harmless, and this molybdenum-disulfide washes off easily and is a good reminder that using BCS bullets will keep everything else clean."
This is exactly what I experienced with my moly'd bullets - it washed off easily from my fingers, but I could never wash it off the barrel bore, and over time, I think it accumulated to adversely affect the accuracy.
I ordered some of the Boretec Moly Magic, it gets good reviews and sounds like just the ticket. Once I get this figured out I’m just going to designate one gun to use up the bullets I have on hand, then no more for me. The thousand I have for my .38/.357 I’m just going to sell. I’m simply not going to fool with these bullets, too bad since they shoot very well.Unclenick hasn't had a problem and maybe his technique plays a role. As he stated:
"I never had an issue with the NECO process. I still have a lot of bullets coated with it, but I do clean it out after every range session. Bore Tech makes a special moly cleaner called Moly Magic that seems to work well, but so does Carbon Killer."
I certainly did not clean the 7STW after every range session, so maybe I contributed to the problem. I still have a bunch of moly'd pistol bullets that I have run through the vib cleaner several times but the moly won't completely come off. So I'm afraid to use them. I will, however, get some Moly Magic and see what happens!!!