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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Understanding cartridge efficiency
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<blockquote data-quote="Bart B" data-source="post: 1918033" data-attributes="member: 5302"><p>If a standard volume is desired, first use case outside dimension specs to calculate a weight base using cartridge brass specs. One spec says cartridge case brass weight is .308 pound per cubic inch.</p><p></p><p>Second, subtract case weight from the base weight to get the case volume's weight if full of brass.</p><p></p><p>Third, reverse calculate the volume weight to cubic units.</p><p></p><p>If a mechanical engineer has a better way to establish a standard volume for cartridge cases, three cheers for him.</p><p></p><p>If the case volume at peak pressure is preferred, use chamber dimension specs</p></blockquote><p></p>
[QUOTE="Bart B, post: 1918033, member: 5302"] If a standard volume is desired, first use case outside dimension specs to calculate a weight base using cartridge brass specs. One spec says cartridge case brass weight is .308 pound per cubic inch. Second, subtract case weight from the base weight to get the case volume's weight if full of brass. Third, reverse calculate the volume weight to cubic units. If a mechanical engineer has a better way to establish a standard volume for cartridge cases, three cheers for him. If the case volume at peak pressure is preferred, use chamber dimension specs [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Understanding cartridge efficiency
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