It has been my understanding that trace cooper fouling in the barrel tends to act like a lead magnet and will lead foul more easily than a perfectly clean barrel. Consequently I try to segregate my weapons as being; for cast only or for jacketed. If I run both, I deep clean to remove any hint of copper before running cast.
I'm working with a fella trying to get him set up reloading cast bullets in his Henry 45/70 lever. He has been running factory jacketed through it and I got to thinking about the copper fouling thing and lead fouling.
So I have a couple thoughts/questions:
1. Will/does copper fouling increase the likelihood of lead fouling?
2. Since I often hear PC folks saying a PC'd bullet is basically a bullet jacketed in polymer paint. If we are only running PC'd cast bullets, is the trace copper fouling even a concern?