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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
.277,140gr 3000fps+ in a 16" bbl @ 80000psi
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<blockquote data-quote="J E Custom" data-source="post: 1832953" data-attributes="member: 2736"><p>There are some cartridges that are more efficient like the Sherman short mag and other wildcat designs that help handle the pressure better and control the side effects from pressure. but the difference in 70,000+ Psi and 80,000 Psi is not comparable. There are things that can be done to improve a cartridge enough to out perform other more powerful cartridges with a lot less powder and therefore not require more pressure.</p><p></p><p>Pressure and temperature do the most damage in the 3,000+ ft/sec cartridges. I don't know what Psi the SS mags run, but I would think that around 65,000 Psi would be all that's needed. One of my wildcat designs, will push a 300 grain 338 bullet over 3150 ft/sec without trashing the case and hurting the action because of the design. And when backed off to 3,050, it doesn't show any signs of pressure operating at 62,500 psi. </p><p></p><p>Better design, less powder = less pressure needed to get the same velocity.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1832953, member: 2736"] There are some cartridges that are more efficient like the Sherman short mag and other wildcat designs that help handle the pressure better and control the side effects from pressure. but the difference in 70,000+ Psi and 80,000 Psi is not comparable. There are things that can be done to improve a cartridge enough to out perform other more powerful cartridges with a lot less powder and therefore not require more pressure. Pressure and temperature do the most damage in the 3,000+ ft/sec cartridges. I don't know what Psi the SS mags run, but I would think that around 65,000 Psi would be all that's needed. One of my wildcat designs, will push a 300 grain 338 bullet over 3150 ft/sec without trashing the case and hurting the action because of the design. And when backed off to 3,050, it doesn't show any signs of pressure operating at 62,500 psi. Better design, less powder = less pressure needed to get the same velocity. J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
.277,140gr 3000fps+ in a 16" bbl @ 80000psi
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