quote:

Originally posted by sep:
I've owned two Chronys and a Pact. I started getting 100 fps variations in my velocities so I called PACT and they told me where I live in Alaska the angle of the sun in the summer can create a problem for the sensors.

I bought a CED millennium and continued to get erroneous readings varying by 100fps but not consistently so based on my geographic location after seeing one in action at my local gun range and spending quite a bit of time discussing it's performance with the owner and internet searching for comparisons I bought a magnetospeed. Velocity variation problem solved. It isn't perfect but for my situation it's been consistent so far.