Used in a driving scenario 3/4 of a second is used in moving the foot from the gas pedal to the brake and depressing the pedal. For most people simply depressing a trigger wouldn’t take as long, so I left that out of the equation. Reaction time it is why nobody can catch a dollar bill dropped between their fingers.

That 3/4 second is movement, not the evaluation and decision time.

You have to factor in all the parts to get an honest time.

In classes, I bring a couple of cap guns for students to understand reaction time.
I have them hold the ‘gun’ on me and fire when they see me make my move.
I have yet to have one get a shot off before I do.
And this is with them knowing they need to ‘shoot’, that they will be shooting, that I will be making a move.