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Long Range Hunting & Shooting
308 vs 30-06 and other rounds? WHY is a 308 better?!?
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<blockquote data-quote="Kevin Thomas" data-source="post: 334834" data-attributes="member: 15748"><p>Hey Steve, no, actually it isn't silly to argue efficiency, but it is educational. Problem is, too many folks confuse efficiency with effectiveness. In .22 caliber cartridges, the .22 LR is easily one of the most efficient cartridges going, while the 22/243 Middlestedt is one of the least efficient. However, if we want to whack a rockchuck at 600+, which cartridge makes more sense? </p><p> </p><p>Efficiency is nothing more that energy in vs. energy out. You can figure on roughly 178 ft-lbs of potential energy per grain of single-based extruded powder, and that remains constant throughout the line. Simply running the numbers of muzzle energy gives you a pretty good feel for just how efficient (not effective) a given cartridge is with a particular bullet. For most centerfire cartridges, a 25-30% rate of return is pretty good. Uping the capacity and going to bigger cartridges will show an immediate drop in the efficiency, a true example of the laws of diminishing returns. However, the tradeoff is that they are unquestionably capable of higher levels of performance in terms of velocity and energy, and so it goes.</p><p> </p><p>Always something worth taking a look at, thoughI wouldn't necessarily base my choice of cartridge for a particular application on this alone. </p><p> </p><p>Kevin Thomas</p><p>Lapua USA</p></blockquote><p></p>
[QUOTE="Kevin Thomas, post: 334834, member: 15748"] Hey Steve, no, actually it isn't silly to argue efficiency, but it is educational. Problem is, too many folks confuse efficiency with effectiveness. In .22 caliber cartridges, the .22 LR is easily one of the most efficient cartridges going, while the 22/243 Middlestedt is one of the least efficient. However, if we want to whack a rockchuck at 600+, which cartridge makes more sense? Efficiency is nothing more that energy in vs. energy out. You can figure on roughly 178 ft-lbs of potential energy per grain of single-based extruded powder, and that remains constant throughout the line. Simply running the numbers of muzzle energy gives you a pretty good feel for just how efficient (not effective) a given cartridge is with a particular bullet. For most centerfire cartridges, a 25-30% rate of return is pretty good. Uping the capacity and going to bigger cartridges will show an immediate drop in the efficiency, a true example of the laws of diminishing returns. However, the tradeoff is that they are unquestionably capable of higher levels of performance in terms of velocity and energy, and so it goes. Always something worth taking a look at, thoughI wouldn't necessarily base my choice of cartridge for a particular application on this alone. Kevin Thomas Lapua USA [/QUOTE]
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308 vs 30-06 and other rounds? WHY is a 308 better?!?
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