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Old July 29, 2013, 12:31 PM   #9
James K
Member In Memoriam
 
Join Date: March 17, 1999
Posts: 24,383
The amount of copper (actually gilding metal) fouling left by bullets is not enough to worry about. Ammonia will remove it, but may harm other parts of the gun (or you). A mild abrasive, like toothpaste, can also be used.

Myself? I don't worry about it.

Jim
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