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Long Range Hunting & Shooting
Velocity vs Energy
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<blockquote data-quote="Hand Skills" data-source="post: 1470391" data-attributes="member: 103303"><p>Yup Feenix, your're good - my point was there is a big difference between velocity, and velocity squared. The electrical engineer in me gets bent out of shape on such matters. An engineer would say energy is relative to velocity, and proportional to the square of velocity.</p><p></p><p>The nice thing about energy is it has no direction. It is just a quantity! (Now I'm just playing with words, but that's what forums are for, right?)</p><p></p><p>Momentum on the other hand has a direction. Let's take a look at the momentum in the OP's example;</p><p></p><p>180gr @2057fps = 7.31 Ns</p><p></p><p>Vs</p><p></p><p>250gr @1810fps = 8.9 Ns</p><p></p><p>The units are Newton-Seconds. I recently read Issac Newton is the first individual credited with strapping a telescope to artillery - the first telescopic sight, in the 1700's! Let's give the guy some credit; yay Newton, so glad that apple fell on your head!</p><p></p><p>So even though the energy is pretty close - as Feenix showed, about 10% in favor of the 338. 338 has about 20% more momentum than the 7mm (with these imaginary bullets, at this imaginary distance). This suggests that not only will the 338 make a bigger hole, but it's likely to penetrate deeper also. </p><p></p><p>No need to trust the math, because people who have used both (and some here have) are telling us that!</p><p></p><p>I value personal experience more highly than math, which can be misleading (ahem, energy).</p></blockquote><p></p>
[QUOTE="Hand Skills, post: 1470391, member: 103303"] Yup Feenix, your're good - my point was there is a big difference between velocity, and velocity squared. The electrical engineer in me gets bent out of shape on such matters. An engineer would say energy is relative to velocity, and proportional to the square of velocity. The nice thing about energy is it has no direction. It is just a quantity! (Now I'm just playing with words, but that's what forums are for, right?) Momentum on the other hand has a direction. Let's take a look at the momentum in the OP's example; 180gr @2057fps = 7.31 Ns Vs 250gr @1810fps = 8.9 Ns The units are Newton-Seconds. I recently read Issac Newton is the first individual credited with strapping a telescope to artillery - the first telescopic sight, in the 1700's! Let's give the guy some credit; yay Newton, so glad that apple fell on your head! So even though the energy is pretty close - as Feenix showed, about 10% in favor of the 338. 338 has about 20% more momentum than the 7mm (with these imaginary bullets, at this imaginary distance). This suggests that not only will the 338 make a bigger hole, but it's likely to penetrate deeper also. No need to trust the math, because people who have used both (and some here have) are telling us that! I value personal experience more highly than math, which can be misleading (ahem, energy). [/QUOTE]
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