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Old February 24, 2021, 01:59 PM   #13
rickyrick
Senior Member
 
Join Date: March 15, 2010
Posts: 7,655
I rarely remove copper, but many gun products contain ammonia in order to dissolve copper.

It only needs to be removed at the point of noticeable accuracy degradation.

What would damage a barrel would to be incessantly scrubbing copper out that is doing no harm.
I also will not scrub a bore if I couldn’t fire a few fouling shots immediately after being cleaned of copper.
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