Originally Posted by OP
When I was cleaning it after the last time I shot towards the end some of the patches
were coming out like dark red in the middle. This was after I let it sit for a while with KG 12 in
the bore (first time ever using KG12).
KG-12 causes copper to dry patch out in brown (repeat, reddish BROWN
) color. The volume of that 'color' that comes out of a badly coppered barrel surprises most people.
Keep using it. There is no better copper remover (and it'll also get the multi
layers layers of copper/powder 'sandwich' out as well.)