Re: Differences in Chronograph Readings
A little late, but I'll mention I have the ProChrono and Shooting Chrony Alpha.
Started with the ProChrono about 15 yrs ago and got the Chrony A a couple years ago. I've set them up back to back a few times and I got variations anywhere from 5fps to about 70 fps and it and usually an inconstant variation.
The ProChrono seemed to give more accurate and consistent readouts based on published loads and factory published load velocities. The ProChrono usually works very well on overcast days. On Sunny days it will give more inconsistent readings including occasionally as much as 200 fps off, both high and low.
One day last week, It was reading about 3350 fps for a RUM load I was using, during the afternoon in the sun. A few hours later, i returned and the shadow of the overhead shelter moved out over the chrono and the readings went up to 3400 for the same load, just like that.
This is why I put limited trust in chronograph readings. I think they are good for ball park info, but that's about it.
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