Toprudder
Member
I've had an instance where a shooter in the lane next to me caused my optical chrono to trigger readings. The only thing I could think of was the shock wave from his gun (a really loud gun, don't remember the caliber) was shaking my screens enough to trigger the sensors. 1200fps is very close, just a little over, the speed of sound. The shock wave would arrive just before the bullet, if you are expecting normal velocity from those bullets. So, I think it is possible that it is a combination of things causing the unexpected readings.