brad_vanderband1
Brad do you use breech plug grease or teflon tape on you BP... if grease are you using a grease that also has a metal in it like aluminum or brass...

Back when I was using grease - I noticed that I got a stain in the area of the breech as I shot the grease into the pours of the bore... wasn't a problem but it looked odd. I then tried some anti-seize with an aluminum in it... that was even worse for leaving a marked ring around the breech bore.