Quote Originally Posted by jim View Post
NO, it's cooper fouling. A thorough cleaning with [Insert] cleaner of your choice.

http://www.frfrogspad.com/cleaners.htm

http://www.midwayusa.com/product/260...nt-4-oz-liquid

http://www.midwayusa.com/find?userSe...r+bore+cleaner
That's what I thought from the pic too.