ToME: the Tales of Maj'Eyal

If you shot a few projectiles, and used Vital Shot - all of them will be Vital Shot right?

No, only the Vital Shot projectile is a Vital Shot.

I asked simple question - if I shot a FEW projectiles, and it's Vital Shot - all of them are Vital Shots?

Why you need to complicate everything.

Okay...
1) Don't ask a question if you already know the answer.
2) The question you asked this time is different to the previous question.
3) I can't make sense of the current question.

Say you have Shotgonne equipped and fire a Vital Shot. Does it fire one shot or like five?

Now that is a clear question.
The answer is: it fires 5 shots, but only the first one is Vital Shot.

Are you sure?
How about Gunslinger that shot TWO shots simultaneously?
I remember someone said that both are Vital Shots.