The shooting range can only measure two things: speed and accuracy. But there are many more elements that cannot be measured there that are imperative to success in a gunfight. Timing and tempo being two others.
When to strike is more important than how fast to strike. And how quickly to strike in relation to the enemy's actions is just as crucial. Unimportant issues on the sporting fields, with its start signals, and rules, but intensely important if the goal is to win by design, not merely survive by default.
One important consideration is the timing of starting the fight. Not allowing the other man the opportunity to fully launch once you recognize the sequence of events. Musashi called this "Holding Down A Pillow" like smothering the attack.
The other is how fast and how often do you need to hit him to end the fight. Once the initiative is seized, it cannot ever be relinquished or he will turn the table and kill you. The "limited violence" crowd doesn't understand this.
The timing and tempo of the shots, and the placement of the shots, are all determined by proximity of threat and at what point in the flow of initiative you find yourself when the decision to shoot is completed.