I bought a Pedersoli deluxe rifle from EMF (nice customer experience with them) and I am doing an initial cleaning while refinishing the stock.
I ran wet and then dry patches through it 'til they came clean, However, if I run a clean copper brush through it, I get a dark black residue that can then be cleaned out with the normal wet solvent patches and then dry patches. I have been doing this for days. Am I doing something wrong? I am relatively certain that I am not damaging the barrell with a copper brush, but this has me stymied.
Comments or suggestions?