msreflexValorant Average Reaction Time by Rank
These are the bands this site uses when a click comes back. They describe a browser test, not a hidden Riot number.
Casual · 250–300 ms
You see the swing, then you click. Fine for unrated. In a ranked duel the other player has often already shot.
Gold–Platinum · 200–240 ms
A normal ranked click. You win the duel when your crosshair was already there. You lose it when you have to find them first.
Immortal · 170–200 ms
Fast enough that a dry peek can be yours if the crosshair is on the head line. Still loses to a better angle.
Pro / Radiant · Under 160 ms
The line this page uses for pro and Radiant. One lucky click under 160 does not put you there.
200 ms sits on both lines: Immortal ends at 200, Gold–Platinum starts at 200. The gap from 241 to 249 is between Gold and Casual. 160 to 169 is faster than Immortal and short of the pro line.
Run the test and see which line your click hits.