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robmkivseries70 · April 30, 2013, 06:45 PM

It's copper from the bullets or the bore brush.

It's generally harmless and the rifle may shoot a bit better with it there. Don't sweat it!

April 30, 2013, 06:45 PM	#14
robmkivseries70 Senior Member Join Date: November 15, 2005 Location: free territory Posts: 203	It's copper from the bullets or the bore brush. It's generally harmless and the rifle may shoot a bit better with it there. Don't sweat it!