re: New article from American Rifleman concerning stopping power

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bapple

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thats a gnarly arse video man

Helo,
Btw, my Kahr p9 should be here today or tomorrow.


Be sure and give us a quick review on the gun!

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The article only looks at penetration and expansion and doesn't measure energy

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1/2*mass*velocity*velocity


9mm:
0.5*115*1150*1150=

76,043,750 grains*(ft/s)^2

0.40:
0.5*155*1144*1144=

101,427,040 grains*(ft/s)^2

The 0.40 has about 33% more kinetic energy, but that doesn't necessarily mean more power. That just means more energy. The power will be derived by the bullets interaction with its target.

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All he does is show penetration data. There is nothing new here on "stopping power."

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Lotta folks (not saying Tigah is one of them) want to define a handgun's ability to stop an attacker as "knockdown power."

Handguns have no real "knockdown power" (nor do some centerfire rifles). Handguns punch//drill holes in people, causing tissue damage. But they don't knock people down.

See this video. Pay particular attention from the 3:30 mark to the end - dudes getting shot with .44 Magnum and .308 rifle.
Video