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Thread: Fireforming a 30BR

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  1. #11
    Join Date
    Jan 2016

    With all the variations in chamber reamers!

    I will make myself a case length plug if want to know the actual length the reamer cut or if someone altered the original chamber that was cut!

    I will trim a piece of brass short then full length size case and insert the plug. Seat the plug long then put in rifle and close the bolt it will push the plug into case. Open bolt remove case and measure overall length. I trim my brass .010 short of that measurement.

    My 30BR .330 neck plug is brass with a .330 dia cut square on one end and .3085 bullet dia on the other end. If you know someone with a lathe they can make you one.

    Not all chamber reamer drawings match the actual chamber reamer dimensions.

    Have fun with your 30BR!
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    Last edited by R Stiner; 04-22-2021 at 10:33 PM.

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