.223 Barnes X bullet through the readout panel of a Chrony. Reason was a high carry handle mounted scope on an AR-15 (LOS was NOT the "line of bullet at muzzle") Never saw the chronograph in my sight picture.
The second was done in by a flinch with a 230gr LRN. At 10 ft away, a small reflexive snap down of the wrist is enough to deviate the bullet path from the 3"x8" target it has to go through to reach it's target, record velocity and not destroy the chronograph. "Flyers" kill chronographs!