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Old January 11, 2019, 03:03 PM   #7
Senior Member
Join Date: March 13, 2005
Location: Pennsylvania
Posts: 965
I do notice when I clean the primer pockets with my RCBS Case Prep tool, the soot is usually mixed with brass filings and I assume they are from the sides, not the bottom, of the primer. I assume that only because the bottom never gives out, nor does the hole get any bigger.
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