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  1. Thread: Steel stress

    by tobnpr
    Replies
    25
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    4,448

    Barrel harmonics. And it has a significant...

    Barrel harmonics.
    And it has a significant effect- this "whip" of the barrel caused by the shock wave resonating from breech to muzzle, then back again- many times per second, is a large part of why...
  2. Thread: Steel stress

    by tobnpr
    Replies
    25
    Views
    4,448

    Pressure at the breech is bolt thrust- the "equal...

    Pressure at the breech is bolt thrust- the "equal and opposite" reaction to what's happening after primer ignition.
    Directly proportional to the case head diameter, it's the reason why heavier...
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