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Rifles, Reloading, Optics, Equipment
Reloading
Sorting Brass and Bullets?
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<blockquote data-quote="Mikecr" data-source="post: 1308573" data-attributes="member: 1521"><p>Well, the only attribute behind weight sorting of brass(that I can think of) is capacity. Most people do it because it takes no effort, while measuring actual capacity takes a good bit of effort. Managing capacity takes way more effort. </p><p>Why does capacity matter? </p><p>Anyone that has seen shifts from new brass to fire formed brass(regardless of weights) has seen why it matters. It's initial confinement, and pressure peak shaping, and it will hose up a good tune.</p><p></p><p>There can be different weight distribution in cases, and the sized dimensions affect capacity more.</p><p>Two cases weighing the same, smash one flat with a hammer, they both still weigh the same,, totally different capacities. By 5 firing/FL sizing cycles, measured H20 capacities will not follow a matched brass weight plan. The variances grow as each sizing affects elasticity, leading to brass springing back to varying dimensions all over the place. That brass trimmed away at case mouths with reload cycles? Not an even amount case to case, and directly affecting capacities.</p><p>Bottom line; case weight does not directly correlate with it's H20 capacity. If you want matched capacities, you'll have to suck it up and actually measure it. And in doing so, learning how to credibly measure capacities, you'll learn a lot about brass and sizing.</p><p></p><p>I personally do not bother with weighing, until I'm measuring H20 capacities. This, after 3rd fire forming, with no sizing. The cases I cull out are usually due to capacity shifts, not overall weight.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 1308573, member: 1521"] Well, the only attribute behind weight sorting of brass(that I can think of) is capacity. Most people do it because it takes no effort, while measuring actual capacity takes a good bit of effort. Managing capacity takes way more effort. Why does capacity matter? Anyone that has seen shifts from new brass to fire formed brass(regardless of weights) has seen why it matters. It's initial confinement, and pressure peak shaping, and it will hose up a good tune. There can be different weight distribution in cases, and the sized dimensions affect capacity more. Two cases weighing the same, smash one flat with a hammer, they both still weigh the same,, totally different capacities. By 5 firing/FL sizing cycles, measured H20 capacities will not follow a matched brass weight plan. The variances grow as each sizing affects elasticity, leading to brass springing back to varying dimensions all over the place. That brass trimmed away at case mouths with reload cycles? Not an even amount case to case, and directly affecting capacities. Bottom line; case weight does not directly correlate with it's H20 capacity. If you want matched capacities, you'll have to suck it up and actually measure it. And in doing so, learning how to credibly measure capacities, you'll learn a lot about brass and sizing. I personally do not bother with weighing, until I'm measuring H20 capacities. This, after 3rd fire forming, with no sizing. The cases I cull out are usually due to capacity shifts, not overall weight. [/QUOTE]
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Sorting Brass and Bullets?
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