Try Montana Xtreme copper killer 50BMG. Run patches through then scrub with a good brush. Then I run Kroil through it and dry patch. And finish with some Witches brew bore lube. That stuff is great. Keeps the barrel clean twice as long and can increase barrel life.
I use nylon brushes only and have never had much trouble. But I still never reverse the brush inside the barrel even with nylon.
I use nylon brushes only and have never had much trouble. But I still never reverse the brush inside the barrel even with nylon.