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Registered
Join Date: Jun 2000
Location: bottom left corner of the world
Posts: 22,914
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DR, not that I know anything about it, I just quote other people.
But... What I have read is a bore polish can improve accuracy. They talked about 800 or 1000 grit paper put on a cleaning brush and pulled through the bore a few times. It was just enough to take the high spots or rough spots (lack of quality machining) off the machining of the rifling.
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