Hi guys, I have a P226 MK25, and fired under 200 round. Now I got a barrel inside rust or brass cover or something else, I don't. Not the whole barrel inside, just about 1/2 inch in the front. The inside looks not flat and shining (I think this barrel should be chromed).
I have already used Hopper's No.9 and Elite Gun Cleaner to try to clean it, but could not be removed. Could someone help me to figure out what happened to my barrel and how to fixed it?
Thanks a lot.
Update, has already use Hopper's copper remove to clean, but still have some thing inside the bore, see the picture below, is this abrasion or copper or something else fouling? How can I clean it?
I have already used Hopper's No.9 and Elite Gun Cleaner to try to clean it, but could not be removed. Could someone help me to figure out what happened to my barrel and how to fixed it?
Thanks a lot.


Update, has already use Hopper's copper remove to clean, but still have some thing inside the bore, see the picture below, is this abrasion or copper or something else fouling? How can I clean it?

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