Chronograph sun screens

direct sunlight will cause odd readings. I have had to put a piece of cardboard over the sunscreens. I have used mine in cold weather to check on temp stability of hunting loads, only issue I saw was the battery, had to warm it up or the crono would not power up. but that was in 10degree weather.

I use a full cover, clipped to the factory sunscreens with those spring clips. I bought a pack of white flexible cutting board sheets at Walmart.
https://www.walmart.com/ip/2-Pack-H...Chopping-Mat-Cutting-Boards-12-x-15/539639878

Cut to fit and use 4 clips to secure to the factory sunshades. It won't help on a low sun angle, but helps when overhead. Best is overcast day when no screens are needed - just the posts to help center the shots over the sensors.

I used 1 piece and attached with wire and clips to the factory sunscreens.

I have the Shooting Chrony.
In addition to the above, I have found that when the battery is less than excellent, I can get sporatic 'errors' similar to what you describe. It seems that once the best part of the battery charge has been used, the error rate increases.
For instance, I was getting apparent error ridden data from my Chrony for several range trips and thought I might be having component issues with old primers or powder. Terribly frustrating. Then I changed the battery and everything went back to normal. Go figure.

Poper said:

I have the Shooting Chrony.
In addition to the above, I have found that when the battery is less than excellent, I can get sporatic 'errors' similar to what you describe. It seems that once the best part of the battery charge has been used, the error rate increases.
For instance, I was getting apparent error ridden data from my Chrony for several range trips and though I might be having component issues with old primers or powder. Terribly frustrating. Then I changed the battery and everything went back to normal. Go figure.

Click to expand...

I wonder if my shooting chrony suffered the same. I could not get it to register subsonic velocities so I gave up. I wonder if a new battery would have fixed the problem. Instead I purchased a LabRadar and am so far very happy with the unit.

kilizyrag said:

I wonder if my shooting chrony suffered the same. I could not get it to register subsonic velocities so I gave up. I wonder if a new battery would have fixed the problem. Instead I purchased a LabRadar and am so far very happy with the unit.

Click to expand...

I, too, have been considering a LabRadar. I just haven't been able to talk myself into it yet. Yet.....

The Shooting Chronys, IMHO, are not noted for consistency and precision. They are better than nothing at all, though.

Poper said:

I, too, have been considering a LabRadar. I just haven't been able to talk myself into it yet. Yet.....

The Shooting Chronys, IMHO, are not noted for consistency and precision. They are better than nothing at all, though.

Click to expand...

I used my last stimulus bucks to purchase the LabRadar. Would not have done so in normal times, but when someone gives me money I can spend it.

A lot of times the sun is at such an angle that the factory sunscreens don't shade the eyes and readings are screwed up. I made a cover out of some scrim cloth that works quite well. I used some rebar tie wire strung between the factory sunscreens for support and velcro attachment which allows me to position the screen as needed. In this pic I was at the range early in the day and the sun was coming in from the side, so I hung the screen from the side instead of over the top. Worked great.

I've never used the screens and never had a problem. Wondering if I'm just lucky or that far north?

I have the Shooting Chrony master version and live in the deep South. Just the opposite for me.

By far the best results come with using skyscreens, I rarely get an error with them. Results are much less consistent without screens. The sun angle doesn't seem to matter much, the photo sensors are deep enough inside the housings that they only have direct sun if the sun is directly overhead or nearly so. I this case the chrono doesn't work well at all without the screens and just fine with it. The factory screens I use are opaque white plastic of some sort.

Remember it's possible to get very strange results if the chrony is too close (blast or debris can trigger one or both sensors giving false readings).

My experience has been with Chrony, CED, Labradar and Caldwell.

My current one is Caldwell (the 'upside down' version) and so far it works well. Only shot with it on two or three occasions. I've notice the sensor type chronos work well when both sensors are in the same lighting conditions. In other words, both in the sunlight or both in shade. The upside down Caldwell is always both in shade, due to the design. I really miss Shooting Chrony, that was my favorite. The CED worked well, but one had to replace one of the sensors about every four uses. The Labradar is irrational and unpredictable. (Or I cannot divine from the instructions just what I am doing incorrectly.)

I'm reasonably convinced the 'balanced lighting' idea is worth study.

I missed out on the Oehler. Dang.