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Old March 18, 2013, 01:45 PM   #2
Unclenick
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Join Date: March 4, 2005
Location: Ohio
Posts: 21,063
If it feels like wax it probably is. The wax would pick up dust from the tumbling media for it's color.

Since you didn't notice the problem when you were shooting, where it should have picked up soot on the wax, I'm going to guess the contamination happened after shooting and before cleaning. Any chance the fired brass got into a bag with some lubricated cast bullets?
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