While not falling plates, matches at my club have us shooting all sorts of things at 50 yards. Bowling pins, gongs, clay birds, etc.
I always use my 625-3.
It has a Ultradot Matchdot II on a Weigand rail.
Very competitive setup. Win my share and am usually in the top 3.
Tried the FF3, and it just wasn't precise enough for this.
With the Ultradot, I can select dot sizes (smaller is better), brightness, elevation adjust knob, and maybe most important, attach a neutral density filter to the front lens to control contrast and prevent dot washout on bright sunny days.
The FF3 is better suited to close-in speed games, something I don't do very often, so that optic has been relegated to the parts box.