The closest thing I've been in to a gunfight was force-on-force training with Simunitions. If you ever have a chance to do this, I would strongly recommend it. In one of the classes I took, the instructors' goal was to push our stress levels up so that we suffered from tunnel vision and auditory exclusion. For most of us in that class it was pretty effective towards those ends.

I'm pleased to report that I did what I was trained to do during the Simunition gunfights: I used precision shooting with the sights at longer distances, flash sight picture at shorter distances, and point shooting at bad breath distance.

For most people, point shooting doesn't work unless you use the correct grip and train to do it.