Long Range Hunting Online Magazine

Go Back   Long Range Hunting Online Magazine > Hunting > Long Range Hunting & Shooting

Long Range Hunting & Shooting Nightforce Optics


Terminal Energy Required to Kill Game

LinkBack Thread Tools Display Modes
Unread 04-19-2008, 04:26 PM
Silver Member
Join Date: Jan 2008
Location: Elko, NV
Posts: 461
Originally Posted by jwp475 View Post
No I have reasearched this very thorughly and in Collisions FPE is not conserved. Accept it or not it matters not to me, but it is the case...
Again, as predicted, you did not read the response very closely.... no one has said that FPE is conserved.
Reply With Quote

Unread 04-19-2008, 04:44 PM
Platinum Member
Join Date: Feb 2005
Location: USA
Posts: 2,598
Originally Posted by pstimac View Post
This is not the case. While KE is not conserved, I have yet to find a physics book that says it's converted mostly into thermal energy. However, I have read where most of it's converted into damage to the colliding bodies. I'm not a physics professor but I work next to one as a adjunct math instructor. I'll ask Dr. Hannigton the next time I run into him.

JWP475 it's clear you are not reading the replies in this thread (and others) or the book you reference very closely. I suspect that this will continue.

Also,just because energy is defined in Joules doesn't mean the transfer is to thermal energy.

Yes I am reading, but you are not understanding.. Yes it is mostly transferd into Thermal energy and since energy is not conserved and momentum is, then it is the momentum that is transferd...
range it,check the wind, dial in correction, aim and only one shot
Reply With Quote
Unread 04-19-2008, 05:05 PM
Platinum Member
Join Date: Jul 2004
Location: Texas
Posts: 7,189
Dam guys lighten up !!

I told you this would never be settled.

But I can tell you one thing ,When I was a young boy and did'nt
all ways behave my parents would give me the choice of weapons that
would be used to line me out and I would allways choose a willow switch,
(very light,with high velocity and low energy)without any knowledge of
such things but I did know enough to stay away from baseball bats
tire tools and crowbars.(Heavy, slow and with lots of energy) because they
would remove pieces from your body.

Just kidding guy's

Last edited by J E Custom; 04-19-2008 at 08:17 PM.
Reply With Quote
Unread 04-21-2008, 06:57 PM
Silver Member
Join Date: Feb 2008
Posts: 121
More is better than less

If I won't stop reading these posts anytime soon, I'll have a Master Degree in Physics and Mathematics. However, I will always agree that the larger/faster/heavier/more energy bullet will kill better and quicker then the smaller/slower/lighter/less energy bullet will.


Last edited by P KUNDA; 04-21-2008 at 08:30 PM.
Reply With Quote
Unread 07-31-2011, 07:34 PM
Bronze Member
Join Date: Jun 2011
Location: charlo, MT
Posts: 86
Re: Terminal Energy Required to Kill Game

you guys are all arguing about something and forgetting a critical kinetic energy factor. torsional energy. this arguement as far as i am concerned was settled many years ago by a guy named P.O. Ackley. he was one of the first to recognize hydralic shock and document it's affects. he found out that it wasnt just due to the speed of the bullet, altho, it did occur far more often above 3 times the speed of sound. however, it also occured when the same bullet often dropped below 1000 fps and less than 850 ft/# of energy retained. he dropped wild asses out past 700 yards with a 220 swift. standard 55 gr. bullet. any of you guys will see that the energy-kinetic or otherwise described is pathetic at that range. those very tough animals went down like they were poleaxed. same hydralic shock affect as if they were at muzzle velocity range. he postulated (and this is the ONLY explaination i have heard that makes sense to what i have seen in the real world) is that the torsional energy developed by a bullet doing 4000 fps at 1-12 twist would be from doing 240,000 rpms. these rpms do NOT decrease with range and i would agree with him that this would explain the tremendous destruction i have witnessed at very long ranges. i shot 3 caribou with a 300 WM , 200 gr SGK at 2900 FPS over 1300 yards. one shot blew a front quarter off, a second caribou lost a hind quarter and the third was almost cut in half.
all the formulas you guys come up with wont do a thing because you failed to factor in the crucial "kinetic energy" that doesnt slow down with distance. RPM's. took an old guy years to answer that one. all the formulas given dont explain the destruction of the game by a projectile doing less than 1000 fps.
the same reasoning i have applied to other things as well. shoot the thing. if the bullet tumbles going subsonic, try another type, twist, etc. not all tumble and the jury is still out on why as no particular formula tells us why.
Reply With Quote


Thread Tools
Display Modes

Similar Threads for: Terminal Energy Required to Kill Game
Thread Thread Starter Forum Replies Last Post
How much Energy to kill a Deer? 700man Long Range Hunting & Shooting 35 07-18-2013 03:30 PM
Trying to find min amount of bullet energy required to make clean kill at long range Thewildedge Long Range Hunting & Shooting 8 01-02-2011 06:40 AM
Terminal results from 350gr SMK on game. groper Rifles, Bullets, Barrels & Ballistics 10 08-26-2010 08:15 PM
lower velocity/energy limit MK performance on big game sscoyote Rifles, Bullets, Barrels & Ballistics 4 07-13-2003 08:29 PM
Terminal Energy is.....? MAELTY The Basics, Starting Out 4 03-25-2003 08:02 AM

All times are GMT -5. The time now is 04:30 AM.

All content ©2010-2015 Long Range Hunting, LLC