No I'm using just one kind of ammo for now, the barrel does have some pretty sharp edges.
Anyway I'm positive it's copper fouling, I'm confident that I'll be able to clean it off with Montana X-Treme and a little bit of scrubbing. Thanks guys!
Remember this when you support the labeling and tracking of people and the complete digital takeover of commerce:
"It causes all, both small and great, both rich and poor, both free and slave, to be marked on the right hand of the forehead so that no one can buy or sell unless he has the mark, that is, the name of the beast or the number of its name" Revelations
"So you say your prayers and you thank the lord, for that peace maker in the dresser drawer"