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Borescope rust?

Dildobaggins

Major Hide Member
Full Member
Minuteman
  • Jun 26, 2020
    1,009
    474
    Bought a bore scope. Had this barrel (criterion 6mm creedmoor.) sitting around for a few months before I put it on my action. Went out and shot it. Put about 10 rounds through it.

    Cleaned it with a cleaning jag, bore paste, and cleaning patches. Is this rust?

    I get so much conflicting info from my local gunshop. They say never use a brass brush and just do it the way I did it....they also sell custom jags, bore paste, etc. What's the best way to clean a barrel, and best way to clean a barrel and remove that?
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