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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Overpressure and case head growth
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<blockquote data-quote="MagnumManiac" data-source="post: 2979805" data-attributes="member: 10755"><p>Good brass, Lapua, Winchester & RWS, all use 70/30 cartridge brass and is the hardest I know of potentially, I'm sure there are others as hard, but as tin content rises, the harder it is.</p><p>With the pressure trace, no correlation between brass deformation and pressure could be assumed…soft brass expands at lower pressure and was not traceable linearly in its entirety. Sometimes it would track normally and show nothing, expanded pockets or ejector marks, but when powders changed, and therefore max pressure rise, the brass would fail without an overload.</p><p>Nothing in this game is set in stone.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 2979805, member: 10755"] Good brass, Lapua, Winchester & RWS, all use 70/30 cartridge brass and is the hardest I know of potentially, I'm sure there are others as hard, but as tin content rises, the harder it is. With the pressure trace, no correlation between brass deformation and pressure could be assumed…soft brass expands at lower pressure and was not traceable linearly in its entirety. Sometimes it would track normally and show nothing, expanded pockets or ejector marks, but when powders changed, and therefore max pressure rise, the brass would fail without an overload. Nothing in this game is set in stone. Cheers. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Overpressure and case head growth
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