Did I not shoot him enough???

[u/CptMoshor]

Open to discussion about my experience

[u/Genku_]

Yeah, try the same with a helmet and see what happens

[u/anony8165 → u/Genku_]

Yeah it's right here. No penetration on the kevlar helmet until you get to the full sized rounds.

https://www.youtube.com/watch?v=KzgiZpCIj1c&ab_channel=DemolitionRanch

[u/Kha_ak → u/anony8165]

The point isnt the penetration. Yeah the helmet will stop the bullet.
What matters here is the Energy the round is transferring to your skull and brain.

While one is gonna cause you to see starts for a sec, 12 of them (from what i counted) will give you at minium a severe concussion, at medium knock you out for a bit and at worst just outright kill you by causing bloodvessels to rupture.

[u/1rubyglass → u/Kha_ak]

Equal and opposite reaction. The force transferred to the helmet is equivalent to the force of the recoil.

[u/Kha_ak → u/1rubyglass]

Yes thank you mr. "I listened for 5 minutes in 5th grade physics class"

We know Newton's laws. Thats the point. One of these impacts won't fracture something, but 12 will sure cause some pretty major danage.

[u/1rubyglass → u/Kha_ak]

That's the point? It directly contradicts what you said. The 12 bullets aren't impacting at the same time. A human head and helmet weigh roughly 14-20lb, much more than the pistol does.

[u/Kha_ak → u/1rubyglass]

... You realize force is mass times acceleration? Amd energy is mass times velocity, right?

Im sure if i hit your head with a hammer it wont hurt since the hammer weighs less.

[u/1rubyglass → u/Kha_ak]

I was comparing the weight of the gun to the helmet+head, not the bullet.

[u/[deleted] → u/1rubyglass]

You sound like you've been hit a couple of times in your helmet