TLong story short, no, people don't generally die instantly when they're shot.
Especially with a handgun. I remember a quote from when I lived in the US of someone having shot someone like 20 times. When asked why they did that, their response was that all they had was only 2 full magazines on them at the time...
There is a lot of nonsense in movies:
- handguns are NOT a one-hit kill, as you described
- the throw back is also bullshit; physics dictates the shooter would have to deal with the same amount of force in recoil
- muzzle flash... yeah... I don't think I've seen a realistic muzzle flash in a movie, like, ever (well, almost)
But... we have all come to expect certain things from movies. Reality is what we perceive. However, I'm constantly having to work on not being ripped out of "suspension of disbelief" whenever someone pulls out a gun.
My next project, we're going to have to have some firearm action, and I'm already struggling with trying to balance realism with "realism". Not sure which is going to win, except there will be NO bodies flying through the air from a bullet impact, that's one I just cannot accept!
CraigL