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Rifles, Reloading, Optics, Equipment
Reloading
Norma case weight variation?
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<blockquote data-quote="MagnumManiac" data-source="post: 1537262" data-attributes="member: 10755"><p>3gr spread will show zero capacity difference in most cases.</p><p>I normally check capacity with a Burrette filled with 50/50 isopropyl alcohol and water.</p><p>In my experience a 3gr WEIGHT difference will show less than 1/10th of a CC in capacity. In an '06 size case, this is insignificant.</p><p></p><p>This is how I explain why case weight rarely matters within the same brand.</p><p>Next time you trim a few cases, before you discard the shavings, take some and weigh it up to 3gr and see just how little it is.</p><p>This difference may just be in the extractor groove due to it being cut eccentric or from forming in slightly different dies where a little more was trimmed from the length.</p><p></p><p>Even weighing H2O can tell you if there is in fact a capacity difference.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 1537262, member: 10755"] 3gr spread will show zero capacity difference in most cases. I normally check capacity with a Burrette filled with 50/50 isopropyl alcohol and water. In my experience a 3gr WEIGHT difference will show less than 1/10th of a CC in capacity. In an ‘06 size case, this is insignificant. This is how I explain why case weight rarely matters within the same brand. Next time you trim a few cases, before you discard the shavings, take some and weigh it up to 3gr and see just how little it is. This difference may just be in the extractor groove due to it being cut eccentric or from forming in slightly different dies where a little more was trimmed from the length. Even weighing H2O can tell you if there is in fact a capacity difference. Cheers. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Norma case weight variation?
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