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Thread: Mosin bore sizes

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  1. #6
    Legacy Member WarPig1976's Avatar
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    Jeff
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    .3105 is the surplus diameter. Something else is not right as people shot .312 all day long in Mosins. Are you seated too long? If it where me I'd be looking elsewhere. Shine a light down there and use a dental mirror to do a though inspection. Your shooting lead? Maybe you have some nasty lead fouling? Just an odd problem...

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