Momentum and Foot Pounds Energy

17 March 2002, 06:50

In my eyes the momentum energy is "Stopping Power" is the foot pounds energy the energy who do the damage to the animal when the bullet expand and leave energy....?

When the bullet hit the animal and start to expand and leave energy, is it then the energy who do the bigger hole than the bullet diameter....?

What would do the biggest damage to a anmial... a light weight bullet whit high velocity or a heavy bullet whit big diameter when it expand....? 30-378 WBY V/S 577 T-REX.

I ask this question for the last time guys so try to answer what you really think about this....!

Thanks......

17 March 2002, 20:17

Overkill

Isnt here any buddy who want to talk about this...?

18 March 2002, 02:19

<Dave>

Overkill,

You have no doubt left us the finest example of ebonics available anywhere. Where in Sweden could you possibly have learned such a champion dialect?

------------------
Davis Chase

18 March 2002, 10:03

<DD>

OVERKILL: I just wish you would learn how to spell "with"

18 March 2002, 10:25

Ken Cline

The 577 will have a much bigger effect on the "moos" than the 30-378 assuming that the point of impact is the same. I will tell you about a formula you may not know about. John Taylor created a KO (Knock Out) value formula to use on cartridges: Velocity of bullet (feet per second) x caliber of bullet (inches) x bullet weight in pounds (bullet weight in grains/7000).
If you do this correctly, the number should be between 10 and 150.

21 March 2002, 19:05

<Overkilll>

Tanks.

22 March 2002, 03:13

<eldeguello>

Overkill, a lot of very knowledgeable people over the years have tried to devise some numerical means of expressing a firearm's ability to "knock down" or "kill" game (or people). To date, no-one has succeeded in creating a reliable measure of this ability. Neither kinetic energy (foot/pounds) or momentum (pounds/feet) are reliable in this regard. Neither are a number of other measures, some of which include factoring in bullet diameter, bullet type, sectional density,etc., along with projectile weight, velocity (straight, squared, cubed, etc.). The reason is that every head of game shot reacts somewhat differently, and the circumstances of each individual shot taken are different (range, angle, point of impact, organs struck, etc.). Lotsa luck!!

22 March 2002, 05:37

Recono

OK,

Momentum is mass x velocity.

Energy is .5 x mass x velocity x velocity.

You and the moose feel about the same momentum (you feel a bit more), but it usually doesn't hurt you as much.

Some people think momentum is a good measurement of something relating to hunting. Maybe they are right.

Some people think energy is a good measurement of something relating to hunting. They are wrong.

Big animals are killed by having their inner parts exposed to light, preferably lots of it. This is one reason why "good old boys" bring lights along when they hunt at night.

22 March 2002, 05:48

Recono

quote:
Originally posted by Overkill:
In my eyes the momentum energy is "Stopping Power" is the foot pounds energy the energy who do the damage to the animal when the bullet expand and leave energy....?
When the bullet hit the animal and start to expand and leave energy, is it then the energy who do the bigger hole than the bullet diameter....?
What would do the biggest damage to a anmial... a light weight bullet whit high velocity or a heavy bullet whit big diameter when it expand....? 30-378 WBY V/S 577 T-REX.
I ask this question for the last time guys so try to answer what you really think about this....!
Thanks......

Sorry, Overkill. I did it again! I think you asked a serious question, and I didn't read it carefully enough.

You really need to hear more about this from the IWBA, but as I understand it, the energy mostly doesn't do much besides expanding the bullet. Supposedly, at certain speeds there is a kind of shock wave or something (I am not a physicist, and I'm lucky I can even spell it) that causes what is called a temporary wound channel. I think it is generally believed now that only the permanent wound channel matters. In other words, the more light you let in, the sooner the animal dies.

Within reasonable limits, the heavier bullet will penetrate farther. This is important in many cases.

The bottom line is that there are several very specific ways in which an animal is killed with a bullet, such as destroying certain parts of the heart, or severing the spinal cord, probably with the aid of vertebral fragments. You must have enough penetration to REACH what you are trying to destroy, and you must have a bullet big enough to destroy it. I think that Kevin Robertson's THE PERFECT SHOT contains most of the answers.

P.S. Read eldeguello's answer again!

[This message has been edited by Recono (edited 03-21-2002).]