Thanks. I'll give that a try.A bronze 6mm brush with Hoppes turned by hand should remove that.
Yes. If it was mine it would concern me simply because it will get worse and then it will take more aggressive cleaning to get rid of.This is the transition at the end of the chamber.
Is that a carbon ring? Is it large enough to be concerned?View attachment 1701186
I had concerns since this 223 barrel has a Wylde chamber and I shoot standard length brass.
Thanks
^^^^^A bronze 6mm brush with Hoppes turned by hand should remove that.