its simple physics...
the reaction on the receiving end can only be as strong as what happens when you pull the trigger.
for someone to be thrown back by a bullet hitting them, it would have 2 knock the shooter on his ass as well.
look for sniper videos, real ones... head shots. They all react different, just as an animal does. Shoot an elk broadside in the vitals and it may run a mile. Hit another elk in the same exact spot and it could drop instantly.
As far as the head jerking around violently from impact alone, it doesnt happen.
I have seen a guy shot in iraq in the back of the head by a .50 and his head went forward(what was left of it), but his whole body took like 6 shots within 2 seconds so there was a lot of energy hitting his body. a .50 puts out around 12,000 ft lbs with a 700 grain bullet, x 6 on the guys body...do the math.
In comparison, a 7.62 nato round (.308win) has around 2,800 ft lbs, and thats what the sniper rifles in recon depict(if its realistic).
Now shoot a .50 standing up, and it will definitely jerk your shoulder back reeeeeal good
It would do the same to someone on the receiving end, for the most part, but not any type of a violent toss like Hollywood depicts
I cant stand that fake shit.
EDIT: it also depends on the ammo used. a FMJ will zip thru the target a lot easier, where as a soft point/hollowpiint match will mushroom more and put more a of a *push* on the object. JFK was shot with a .308, and it obviously hit him in a way where it caught some skull and the skull acted as a wall and allowed the energy from the bullet to transfer differently than normal. Quite a few variables indeed. If the shooter wanted good mushrooming, he used a hollowpoint match, it would insure a lot of damage, and they are the most accurate of the loads he had available.
You all saw pics of the bowling ball I shot with my .308 at 100 yards. It barely moved when i shot it. If I had used a HP match, it would have moved more instead of the FMJ I used that zipped right thru it. I love running ballistics tests
Id like to try on Kenny K, the worthless waste of skin!
Yay, someone else on my side! By the way, guys, this is all proven in Mythbusters.