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Rifles, Reloading, Optics, Equipment
Reloading
brass weight sorting
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<blockquote data-quote="Topshot" data-source="post: 560583" data-attributes="member: 13285"><p>I use to test dive cylinders. Water was used to measure volume, before, during and after the pressure test. </p><p> </p><p>But before this could be done the water needed to be compressed a few times in the cylinder to release the air that it contained. It was surprising how much the volume changed with each compressing.</p><p> </p><p>Water volume measurement is useless without compression. </p><p> </p><p>Also cases will change their internal volume with each firing. </p><p> </p><p>A once fired case will have a different volume to the same case after it has been fired a number of times and has case head expansion, been trimmed a few times, has loose primer pockets and is due to be chucked out.</p></blockquote><p></p>
[QUOTE="Topshot, post: 560583, member: 13285"] I use to test dive cylinders. Water was used to measure volume, before, during and after the pressure test. But before this could be done the water needed to be compressed a few times in the cylinder to release the air that it contained. It was surprising how much the volume changed with each compressing. Water volume measurement is useless without compression. Also cases will change their internal volume with each firing. A once fired case will have a different volume to the same case after it has been fired a number of times and has case head expansion, been trimmed a few times, has loose primer pockets and is due to be chucked out. [/QUOTE]
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