24.39. .22cal

For testing and tuning shoot longest distance you have available.
Try in range between 930 and 960, high Reg and short Dwell.
Start from 910 shoot groups of 5 and increase by 10 fps, repeat groups of 5 and increase. Happened to me a window of about 20 fps where the groups are tightest.
This will give you a start only, because the Temp or Hum difference at my place.