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Rifles, Reloading, Optics, Equipment
Reloading
Brass weight... How important?
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<blockquote data-quote="ntsqd" data-source="post: 1630197" data-attributes="member: 93138"><p>Going back to the example of all of the cases having been sized in the same FL die or better having been fired in the same chamber and are trimmed to the same length they would now have all the same exterior dims. The density of most metal alloys that have been cold-worked or forged doesn't vary much. Different alloys of brass could have different densities, but same mfg cases should be the same alloy. Certainly this is more true within a lot. Mixing lots might see a subtle alloy deviation.</p><p></p><p>So if the cases are all the same exterior dims and the metal density is the same, then weighing the cases will tell you, by calculation, what the brass volume is. Subtract that from the chamber volume and you have max powder volume. This would assume maximum powder packing, which won't happen, and not a compressed load, which could easily happen because it includes the case neck volume.</p><p></p><p>Depending on the need and application it may be splitting hairs, but to say that weighing cases is useless is not correct. There's a lot to be learned from doing so. If justified.</p></blockquote><p></p>
[QUOTE="ntsqd, post: 1630197, member: 93138"] Going back to the example of all of the cases having been sized in the same FL die or better having been fired in the same chamber and are trimmed to the same length they would now have all the same exterior dims. The density of most metal alloys that have been cold-worked or forged doesn't vary much. Different alloys of brass could have different densities, but same mfg cases should be the same alloy. Certainly this is more true within a lot. Mixing lots might see a subtle alloy deviation. So if the cases are all the same exterior dims and the metal density is the same, then weighing the cases will tell you, by calculation, what the brass volume is. Subtract that from the chamber volume and you have max powder volume. This would assume maximum powder packing, which won't happen, and not a compressed load, which could easily happen because it includes the case neck volume. Depending on the need and application it may be splitting hairs, but to say that weighing cases is useless is not correct. There's a lot to be learned from doing so. If justified. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Brass weight... How important?
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