Home Forums Hunting & Shooting Ask The Gunwriters Excessive carbon fouling with new powders?

I have found that some decoppering agents must work better than others.

I was working up loads for a new barrel on my benchrest gun in 6ppc, the two powders I was using were VVN133 and IMR8208XBR. I would shoot 20-25 shots then clean before switching to the other powder. Every time I had copper fouling with VVN133 and not even a trace of copper with IMR8208XBR and it also burned much cleaner........as luck would have it my rifle shot tighter groups with VVN133 as most do