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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Hornady ELD-X Official Thread
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<blockquote data-quote="Stumpm2" data-source="post: 1130734" data-attributes="member: 5184"><p>There is a lot more to bearing surface/friction, pressure, and velocity. A longer bearing surface will create more friction and with fast burning powders will create a pressure spike early in the barrel and probably cause slower velocities. However, with slower powders, the longer bearing surface and friction may help to utilize all of the powder and keep a longer peak pressure down the barrel to create more velocity. If you can maintain peak pressure down more of the barrel, then 55,000 psi with more friction can be faster. It is all about the total area under the pressure curve which equates to the amount of potential energy available to be converted to heat and kinetic energy. Way too many variables including barrel twist, number of grooves, groove size, ect.</p></blockquote><p></p>
[QUOTE="Stumpm2, post: 1130734, member: 5184"] There is a lot more to bearing surface/friction, pressure, and velocity. A longer bearing surface will create more friction and with fast burning powders will create a pressure spike early in the barrel and probably cause slower velocities. However, with slower powders, the longer bearing surface and friction may help to utilize all of the powder and keep a longer peak pressure down the barrel to create more velocity. If you can maintain peak pressure down more of the barrel, then 55,000 psi with more friction can be faster. It is all about the total area under the pressure curve which equates to the amount of potential energy available to be converted to heat and kinetic energy. Way too many variables including barrel twist, number of grooves, groove size, ect. [/QUOTE]
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Hornady ELD-X Official Thread
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