What would you consider a split time on the ar-15 that show's "mastery"

[GH41]

If you spend your days shooting at paper split times matter more than when you’re shooting at people.

If I’m shooting at paper, I like to work toward solid accurate 1/4 second splits.

Shooting at bad guys I like 1/2 second split times.

The mind takes about 1/4 second to process information and react. Therefore 1/4 splits are too fast to process information in a defense situation.

It’s a lot easier to start shooting than it is to stop shooting.

I would think the processing of information would take place before pulling the trigger the first time not between shots at the same target. I it's a single adversary I'm shooting until he no longer controls the weapon he brought to the fight.