I have read that the street shoot out in Closed Range is one of the most realistic shoot out scenes ever in a western.
Not much accuracy and everyone not too far away from each other.
But my favorite scene is when Costner just walks up to a bad guy and asks him if he killed his friend. The guy says yes. Costner just draws and shoots the guy and walks on.
He chose...poorly.
That is one my favorite scenes too!