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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Understanding cartridge efficiency
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<blockquote data-quote="Mikecr" data-source="post: 1915756" data-attributes="member: 1521"><p>Seems obvious that gasses expand fast enough for any of our cartridges.</p><p>The analogous limits in velocity are not due to some gas expansion/flow limit.</p><p>That 17-378W would need incredibly slow burning powder to avoid blowing up (military surplus stuff), and then with a 500" barrel, it might just produce 7Kfps. The condition of bullet at departure would be challenging.</p><p>But anyway, the limit there is rate of pressure rise-vs-pressure drop <u>held below failure limits</u>.</p><p></p><p>These call to extremes won't get us anywhere.</p><p>[ATTACH=full]196991[/ATTACH]</p></blockquote><p></p>
[QUOTE="Mikecr, post: 1915756, member: 1521"] Seems obvious that gasses expand fast enough for any of our cartridges. The analogous limits in velocity are not due to some gas expansion/flow limit. That 17-378W would need incredibly slow burning powder to avoid blowing up (military surplus stuff), and then with a 500" barrel, it might just produce 7Kfps. The condition of bullet at departure would be challenging. But anyway, the limit there is rate of pressure rise-vs-pressure drop [U]held below failure limits[/U]. These call to extremes won't get us anywhere. [ATTACH type="full" alt="17-50BMG.jpg"]196991[/ATTACH] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Understanding cartridge efficiency
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