How many ft/lbs of energy is required to effectively kill a deer?

Answer 1

That is virtually impossible to answer.

I've known of deer to be killed with .22 LR bullets with less than 100 ft/lbs of energy, and I've known of them to run for a couple of miles with two or three .300 WinMag bullets packing more than a ton of energy having gone through them.

It is widely accepted that a good deer cartridge will produce 900-1,000 ft/lb of energy at 100 yards.

Doc

Answer 2

The concept is the wrong approach. There are people and even state regulations that say 1000 ft-lbs, but that's wrong-headed. Energy isn't the determining factor, but a proper wound channel in the right place. Some rounds with less energy will do, and a lot with more are nonetheless inappropriate. Pick a proper caliber and a proper bullet, and there's no sense in trying to prove a point by using something marginal.

Answer 3

I've never seen any stats on a deer, but I can tell you that it has been shown that it requires 85 ft pounds of energy to kill a human. A deer is generally a little tougher, so that should at least get you in the ball park.

Answer 4

I have often heard that 800 foot-lbs. at impact is a good minimum. Of course, shot placement and bullet performance are critically important, but a certain minimum of energy is necessary for bullet expansion anyway, as well as shock effect.

Answer 5

900 to 1000 foot pounds shooting a projectile of no smaller than 6MM diameter (.243 inch). Preferably of no less than 100 grain projectile weight. For Elk 1500 foot pounds and for Moose 2000 foot pounds. Each of these coupled with increased bullet weight and diameter.

Answer 6

whats the least fps on a crossbow that will kill a deer

Answer 7

hey are you planning on killing him with your car or a rifle.

1500 ft/lbs @ 300 yrds with a 140 grain is plenty.

Answer 8

All depends on shot placement my friend.