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Rifles, Reloading, Optics, Equipment
Gunsmithing
big cartridges chamber lenght
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<blockquote data-quote="MagnumManiac" data-source="post: 1114050" data-attributes="member: 10755"><p>The standard safety margin is around .020"-.040", as you know, some cartridges stretch quite a bit more than others and if at max length there needs to be some 'wiggle' room. The measurement is normally .008"-.020" longer in the chamber than the max length of the brass, as the brass is manufactured to be .010" shorter than max this gives anywhere up to .040" clearance.</p><p></p><p>The standard specs by SAAMI reamer drawings are a good place to start if designing your own case design. Tapered cases with long shallow shoulders stretch far more than straighter walled sharp shouldered cases, so keep this in mind.</p><p></p><p>Cheers.</p><p>gun)</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 1114050, member: 10755"] The standard safety margin is around .020"-.040", as you know, some cartridges stretch quite a bit more than others and if at max length there needs to be some 'wiggle' room. The measurement is normally .008"-.020" longer in the chamber than the max length of the brass, as the brass is manufactured to be .010" shorter than max this gives anywhere up to .040" clearance. The standard specs by SAAMI reamer drawings are a good place to start if designing your own case design. Tapered cases with long shallow shoulders stretch far more than straighter walled sharp shouldered cases, so keep this in mind. Cheers. gun) [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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big cartridges chamber lenght
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