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What's this in my 20vt bore?
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11-15-2019, 09:14 PM
Daryl
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Join Date: Sep 2006
Location: Prince George, B.C. Canada
Posts: 4,273
Looks like corrosive worm tracks - or un-disciplined pine beetles in the cambium of pine trees.
Likely pitting of some sort - interesting layout patterns, though.
I would clean it well, shoot it and see what happens.
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