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All Springer/NP/PCP Air Gun Discussion General > Big Bore AirGun Gate

Tricks for getting chrony readings?

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Greg_E:
I had very poor luck with my FX radar, and then got careless and shot it. I bought a Labradar but haven't had the time to fool with it yet.

I will say that my FX worked better after giving it a stable 5 volt supply mod, but it didn't last much longer than brief testing. Maybe I just had a bad one, but no longer matters since the Bluetooth module got ripped off the board and many of the traces broke.

Back_Roads:
 It seems less complaints on FX cronys now then at first, but I only read here and watch you tube where they all work now also LOL I might get one sometime yet .

mackeral5:

--- Quote from: Spacebus on January 12, 2023, 02:09:55 PM ---I have also been shopping for chronographs, but the Caldwell and other "established" brands have countless reviews of poor performance in bright or outdoor situations, and I only shoot outdoors. I had good success with a cheap clamp on unit, untill my big bore sent it flying off and breaking it. After attempting to solder things back together it worked well for a few weeks and stopped taking a charge. Should I try another $30 chronograph or save up my pennies for the FX radar unit?

--- End quote ---

I had a very similar experience with Caldwell and Competition Electronics----very fickle when using outdoors under varying light conditions.  These days I never take mine outside even though it would be very useful to record velocities when target shooting....

Airgun-hobbyist:
I had been setting up my chronograph close, but it wasn't doing to well with the big bore's air blast as well.  It went to the ground at one point.  Then I started setting it up a measured distance of 30 feet away and all is good with it now.  Setting the chrony up in your garage at 10 or 15 feet away will have little difference on speeds if you do not use a ballistics app and are only using the chrony for a tuning tool.  When putting the speed data into Strelok Pro for ballistics, I adjust the muzzle velocity number up until it matches the 30 foot distance numbers.  At ten yards the speed differential ranges pretty dramatically based on power and projectile weight, from only 10fps with a 200 grain slug to about 40fps with 45 grain pellets.

miner:

--- Quote from: MikeCarter on January 09, 2023, 08:09:00 PM ---I like mine. I’m no rocket surgeon but I’ve tested in my work van, shop, outdoors in the sun, shade and everywhere,  garage (hoarder mode and cleaned out) kids play room, bathroom, bedroom. As long as the pellet trap is 3 feet away and the fx chronograph is placed correctly basically under the muzzle it gives consistent readings. Im not launching spaceships just reading pellet velocities. Works for me:) oh and it fits in my pocket.

--- End quote ---
One way to check calibration is with a .22 long, pretty well guaranteed at 1163.
I found that indoors or out, infrared causes problems. Florescent or Led lights need to be off, as they cycle on/off 60 times a second and fool the chrony. Bright sun, also another infrared source will blind the chrony. Once I learned this, my clamp on chinee chrony became consistent and reliable.

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