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Min. ft.lbs. for big game kill

 
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  #1  
Old 05-02-2009, 08:03 PM
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Join Date: Apr 2009
Location: Northern Utah
Posts: 16
Min. ft.lbs. for big game kill

I've seen many opinions given regarding minimum velocity on impact to humanely dispatch big game. I believe the rule of thumb is around 2000 fps. However, the ft.lbs. of energy levels are all over the map depending on the caliber being used. Is it a fair assumption that impact energy is as important, if not more important that impact velocity? What is the rule of thumb when it comes to minimum impact energy in ft.lbs. to humanely dispatch big game?

Here are some general numbers I came up with for comparison. Impact velocities and energy levels at 1000 yards

7mm Rem Mag, 168 VLD
Velocity = 1668
Energy = 1037

.300 Ultra Mag, 180 Accubond
Velocity = 1696
Energy = 1149

.338 Ultra Mag, 250 MatchKing
Velocity = 1681
Energy = 1568

.375 Ultra Mag, 260 Accubond
Velocity = 1448
Energy = 1210
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  #2  
Old 05-02-2009, 08:47 PM
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Join Date: Apr 2009
Location: Northern Utah
Posts: 16
Re: Min. ft.lbs. for big game kill

I just found an article posted back in July of 2001 by, cronhelm. The "related articles" feature is pretty nice, Len.

Unless there is new and improved information I don't think we need to revisit this topic.
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  #3  
Old 05-03-2009, 01:37 AM
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Location: The rifle range, or archery range or behind the computer in Alaska
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Re: Min. ft.lbs. for big game kill

As a side note:

The ACCUBOND as well as the TSX and TTSX bullets are rated to 1800 FPS for reliable expansion. The Ballistic tip is 1600. I have tested the 178 AMAX to 1150 FPS and have had expansion.
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Old 05-03-2009, 04:39 AM
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Re: Min. ft.lbs. for big game kill

I think terminal performance of the selected bullet is far more important than energy, or sectional density.

Steve
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Old 05-04-2009, 10:28 AM
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Location: Wyoming
Posts: 2,615
Re: Min. ft.lbs. for big game kill

Caliber is the critical issue and not foot pounds on a ballistic chart. Large calibers at slower velocities will have a far greater impact on large game animals than a smaller high velocity caliber. About 30 years ago I liked to use my 35 herret pistol on elk with a 200 grain bullet at about 1800 fps mv. It had a much greater impact on the elk when hit than magnum rifles in smaller calibers even though the ballistics charts show far greater foot pounds with the rifles. I have seen numerous elk shot with 30-06, 7mm rem mags and other equivalent stuff through the years show virtually no visual sign of being hit and many of them lost where if they had used a 35 whelen or 338 winchester the results would have been a lot different. When I was young I was a guru on all the ballistics charts. Then through the years I gained the experience to know what it takes to kill stuff the best. That is much more important.
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