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Rifles, Reloading, Optics, Equipment
Reloading
Case weight vs internal volume
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<blockquote data-quote="Mikecr" data-source="post: 962769" data-attributes="member: 1521"><p>I would not take any actions out of assumption.</p><p>I think that until you know there is a direct correlation between weight and capacity, for a given lot of brass, it would be imprudent to cull cases based solely on weight. This, because it is possible that some of the same weight cases actually depart in capacity, while some of those culled would have matched a mean in capacity. In this scenario you could be better off taking no actions at all.</p><p>So weight sorting cases may not be 'better than nothing'. It could be worse than nothing.</p><p></p><p>I know that capacity measure is not meaningful for every chamber & reloading plan. </p><p>And it takes a plan. </p><p>You can't just pull new cases from a box and verify matching capacities(they don't). New brass also does not shoot the same as fireformed brass. You can't just go to FL sizing and expect them to match(they won't). You have to first take disciplined steps to get them matching, and even after all that effort, some won't match. Some will need to hit the trash can.</p><p>In a situation where stable case dimensions cannot be reached, and capacity measure means little more than moving target, you could just weigh them and then shoot them, to see if there is direct & significant enough correlation between case weight and chrono readings. Some of this is chamber & load dependent.</p><p>This would actually be better than nothing.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 962769, member: 1521"] I would not take any actions out of assumption. I think that until you know there is a direct correlation between weight and capacity, for a given lot of brass, it would be imprudent to cull cases based solely on weight. This, because it is possible that some of the same weight cases actually depart in capacity, while some of those culled would have matched a mean in capacity. In this scenario you could be better off taking no actions at all. So weight sorting cases may not be 'better than nothing'. It could be worse than nothing. I know that capacity measure is not meaningful for every chamber & reloading plan. And it takes a plan. You can't just pull new cases from a box and verify matching capacities(they don't). New brass also does not shoot the same as fireformed brass. You can't just go to FL sizing and expect them to match(they won't). You have to first take disciplined steps to get them matching, and even after all that effort, some won't match. Some will need to hit the trash can. In a situation where stable case dimensions cannot be reached, and capacity measure means little more than moving target, you could just weigh them and then shoot them, to see if there is direct & significant enough correlation between case weight and chrono readings. Some of this is chamber & load dependent. This would actually be better than nothing. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Case weight vs internal volume
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