I also use the Caldwell, seems to work well, can't complain
Update - 7-6-2018 - Went out on the 4th and used the chrony to setup my gun for heavier pellets. The Caldwell worked flawlessly. No missed readings, and I had the gun dialed in within a few minutes.
I think the secret was that I was working in full sun and I did have the sun shades on. Not sure if that makes a difference, but the setup really worked. I also bought the light kit, not sure how much it really works, but will try it later.