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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Cartridge Efficiency
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<blockquote data-quote="jtmoose" data-source="post: 1149578" data-attributes="member: 87081"><p>I was looking at some tables and noticed that most highly effective/popular cartridges produce approximately 500# of energy at their supersonic threshold distance. Is this a good indicator of efficiency of the cartridge? If it has a longer SS threshold than it can produce 500# of energy is it too "weak" for general purposes. Similarly, if it produces 500# at greater distances than it is supersonic is it too overpowered for general purposes?</p><p></p><p></p><p>308 = .97</p><p>30-06 = .99</p><p>270 = .83</p><p>7 mag = .92</p><p>300 mag = 1.13</p><p></p><p>These numbers indicate, a 270 and 7mag are ballistically superior past effective 500# distance, 300 win mag is a little more powerful than its ballistic stability, and 308/30-06 are about a perfect balance.</p></blockquote><p></p>
[QUOTE="jtmoose, post: 1149578, member: 87081"] I was looking at some tables and noticed that most highly effective/popular cartridges produce approximately 500# of energy at their supersonic threshold distance. Is this a good indicator of efficiency of the cartridge? If it has a longer SS threshold than it can produce 500# of energy is it too "weak" for general purposes. Similarly, if it produces 500# at greater distances than it is supersonic is it too overpowered for general purposes? 308 = .97 30-06 = .99 270 = .83 7 mag = .92 300 mag = 1.13 These numbers indicate, a 270 and 7mag are ballistically superior past effective 500# distance, 300 win mag is a little more powerful than its ballistic stability, and 308/30-06 are about a perfect balance. [/QUOTE]
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