If my self conscious has the sights aligned on the target...as fast as my sub conscious can press the trigger. It takes around 50,000 shots, for a new shooter, to teach his sub conscious to press the trigger. Five shots into one vital part of the body is "effective" --- but five shots into various vital parts on the trunk of the body, is much more "efficient".
Of course... the longer the distance to the target --- the longer it will take to make the shot. Occasionally.... I'm a spray and pray type of guy---at least on the gun range.