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06-17-2012

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06-17-2012 9:30 PM

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  • Posted in thread: question about breaking in a barrel on 06-18-2012 at 01:30 AM
    They say that the sharp edges on the rifling are very important and not to wear them down by
    using grit or fire lapping. So if the sharp edges are so important what about polygonal bores??
    they have n...

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