So I was loading Red Line 158 swc .358 cast bullets, Hogdon Universal powder 4.4gr and after 30 rounds I had some moderate lead deposits about the first 1" of my barrel. Is that an indication of powder too fast or bullet too fast or bullet too slow? I was told they are very "hard" bn20 and need to be pushed fast vs slow, I was loading them in .38 spl cases so not going over 1000 fps for sure. Any FAQ for leading signs and what to avoid would be greatly appreciated. Thank you.