[Yosemitest]

"You will always instantly know how to do it and it will come naturally."

Practice, practice, practice. You fight like you exercise.
You obviously have no military experience.
As you age, some things get more difficult, such as a steady aim, and a rapid draw.
Being accurate is a practiced skill, and accuracy is more important than speed (just as long as you aren't too slow about it).
Then there's reloading practice, and practice builds confidence.
No, it doesn't come naturally. It's a learned and practiced skill.

[DH]

You obviously have no military experience.

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You obviously are not very intelligent. I’m a Viet Nam era veteran!

I an an expert rifleman, member of the NRA and hunt each year. During the year between hunting seasons I only shoot my guns to sight them in. The “science” that comes naturally is to understand how the rear sight and front post align on the target or how the cross-hairs on the scope align on the target. There is nothing else to know.

You don’t need to be a “Rambo” or some type of an action figure to be a deadly shot. When (and if) the civil war begins, I will be taking out targets at a much longer range than you and your pistols and semi-automatic arsenal.