I have a 400 Shot Series I like to use to test our high-level players when we are making mechanical changes. It's a great litmus test to see where they are at, and test them every few days to track progress/see improvement.
With our guy Rayan (career 32.2% three point shooter), our main focus is improving his mechanics and consistency so he can shoot 38-40% this season.
The first time we tried the drill: 204/400 (51%)
The second time (tonight) we tried the drill: 236/400 (59%)
The goal for all of my players is to be between 75-85% with no defense. Day by day, we are making 1% improvements!
Let me know if y'all want the 400 shot series and I'll send it below.