I have some Matt's bullets 165 grain hard cast with gas check. I got up to 1400 fps in my TRR8 S&W 8 shot 5" barrel. I then lowered it to a more sedate 1250 fps. Those ought to work nicely.
It is the easiest to use. Turn it on and use. No matter what the velocity range is.
I tried pistol with the Garmin and the FX. Target was at at 10 yards. Set the garmin for pistol velocities and no reading. Again and again, The FX gave me readings right away and everytime ...... 850 fps...