I agree that the Chrony has its faults. I learned long ago that overcast days were my friend. But it really put an affordable chronograph in the hands of shooters back in the day, though most have upgraded to more reliable equipment. I used my Chrony for a physical science lab where the students fired a Styrofoam dart from a dart gun and measured velocity, then used the dart's mass and velocity to do KE and momentum calculations. Had to play with the lighting then too to make it work well.
