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Energy vs. Energy Transfer

 
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Old 04-30-2014, 01:47 AM
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Energy vs. Energy Transfer

With all of the talk around "what is the best caliber for....." why is it that you don't hear much about energy transfer? For example, hitting an elk with a 250gr .338 will transfer it's kinetic energy better than a 150 gr 7mm Mag assuming the same energy down range. The best way I've heard energy transfer described is would you rather get hit with a fast pebble or a slow brick. Maybe the theory is implied but to a newbie it would seem easier to explain this as opposed to BC, velocity, etc.

Thoughts, theories, and postulations please....
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Old 04-30-2014, 10:19 AM
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Re: Energy vs. Energy Transfer

I think that its not talked about much because the energy that is needed is produced easily with most rifle cartridges and bullet design has alot to do with how energy is transfered you can dump all of your available energy in the animal with certain bullets or you can have a bullet zip right through the animal and dump its energy in the hill behind it so its varied by bullet design,mass and velocity. So for most north American big game a small well designed bullet cookin at 3000fps shot with precision,emphasis on precision.is a better choice. that's the fast pebble, then for dangerous game the slow brick is better I want a big heavy slug dumping all of its energy in a charging grizzly or cape buffalo at 12yrds instead of zipping through it like a needle and not stopping so I think you would hear more about energy transfer in Africa and in grizzly country
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Old 04-30-2014, 11:30 AM
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Re: Energy vs. Energy Transfer

The other thing to think about, is that energy transfer is not just relying on muzzle velocity and weight of the bullet. The fragmentation of the bullet and how that energy is distributed in the soft tissues accounts for the energy transfer. The bullet zipping through idea is a prime example of that. The energy is spent piercing the skin any bone but anything that is left over with an intact bullet will cause loss of energy. I think this number is very hard to calculate exactly. But an idea if transfer is likely more helpful.
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Old 04-30-2014, 11:38 AM
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Re: Energy vs. Energy Transfer

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Originally Posted by marioq View Post
The other thing to think about, is that energy transfer is not just relying on muzzle velocity and weight of the bullet. The fragmentation of the bullet and how that energy is distributed in the soft tissues accounts for the energy transfer. The bullet zipping through idea is a prime example of that. The energy is spent piercing the skin any bone but anything that is left over with an intact bullet will cause loss of energy. I think this number is very hard to calculate exactly. But an idea if transfer is likely more helpful.

So are you saying you'd rather see your bullet fragment, rather than stay together inside the animal as it expands to 2x-3x it's diameter and drops it's energy? If you are, I'm not in your camp theory!
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Old 04-30-2014, 11:40 AM
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Re: Energy vs. Energy Transfer

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Originally Posted by marioq View Post
I think this number is very hard to calculate exactly.
Yeah, there is no real way to calculate KE because you don't ever know exactly what a bullet will do. Bullets all react differently based on what they are hitting, what range they are at, and what speed they are traveling at that point. KE itself isn't all that important, although it could seem that way. Some people prefer to have a bullet react like a Barnes, where it will retain all it's weight and penetrate deeply, most times even creating two holes (one in, one out), whereas some prefer a Berger that dumps a lot of it's energy upon contact and not exiting very frequently. Both methods work very well and you could debate all day on which is better.

However, the one thing that really can't be debated is that a larger diameter bullet should typically do better, assuming everything else is the same at impact. A larger hole will never hurt you . So whether you are shooting a Barnes, a Berger, or whatever else is out there, a .338 will do more damage than a .30, etc.
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Old 04-30-2014, 11:56 AM
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Re: Energy vs. Energy Transfer

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Originally Posted by cohunter14 View Post
Yeah, there is no real way to calculate KE because you don't ever know exactly what a bullet will do. Bullets all react differently based on what they are hitting, what range they are at, and what speed they are traveling at that point. KE itself isn't all that important, although it could seem that way. Some people prefer to have a bullet react like a Barnes, where it will retain all it's weight and penetrate deeply, most times even creating two holes (one in, one out), whereas some prefer a Berger that dumps a lot of it's energy upon contact and not exiting very frequently. Both methods work very well and you could debate all day on which is better.

However, the one thing that really can't be debated is that a larger diameter bullet should typically do better, assuming everything else is the same at impact. A larger hole will never hurt you . So whether you are shooting a Barnes, a Berger, or whatever else is out there, a .338 will do more damage than a .30, etc.
Amen brother!!!
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Old 04-30-2014, 11:59 AM
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Re: Energy vs. Energy Transfer

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Originally Posted by Topgun 30-06 View Post
So are you saying you'd rather see your bullet fragment, rather than stay together inside the animal as it expands to 2x-3x it's diameter and drops it's energy? If you are, I'm not in your camp theory!
No not saying that. Explaining that the question is hard to answer exactly. There are more factors than weight and bullet velocity. Composition matters, materials have an innate property that must be factored into the calculation, though this in nominal in some cases. The question was not asked what do I prefer. It was about energy transfer.
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