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Caldwell Chronograph

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Deerstalker:
I setup & tested my new Caldwell Ballistic Precision Chronograph & iPad APP with my HW95L .22 and these are the results.  24 shots straight without any errors with what I believe is a great product.  Pic & data for H&N FTT 14.66s and Exact Jumbo Heavy 18.13s..


HW95L .22 (stock) FPS Pellet testing. 
Caldwell Ballistic Precision Chronograph & iPad APP

Created: 03/21/21 11:08 AM
Description: 10 shot test for H&N FTT 14.66 gr Notes 1: 25 yard target
Notes 2: Distance to Chrono(FT): 5.00
Ballistic Coefficient: 0.021
Bullet Weight(gr): 14.66
Temp: 51 °F cloudy day
BP: 1030.00 in Hg
Altitude: 495 feet, Cary, NC 27511

Shot #      FPS        FT-LBS         PF
10          679         15.01      9.95   
9           694         15.68      10.17 
8         692         15.59       10.14 
7           691         15.55       10.13 
6          688         15.41       10.09 
5           695         15.73       10.19 
4           681         15.10        9.98   
3          687         15.37       10.07 
2           694         15.68       10.17 
1           686         15.32       10.06 

Average: 688.7 FPS
SD: 5.5 FPS
Min: 679 FPS
Max: 695 FPS
Spread: 16 FPS
Shot/sec: 0.0
True MV: 702 FPS
Group Size (in): 0.00
 
Created: 04/02/21 11:38 AM
Description: 10 shot test for Exact Jumbo Heavy 18.13 gr Notes 1: 25 yard target
Notes 2: Distance to Chrono(FT): 5.00
Ballistic Coefficient: 0.026
Bullet Weight(gr): 18.13
Temp: 46 °F partly cloudy day
BP: 1030.00 in Hg
Altitude: 495 feet, Cary, NC 27511

Shot #      FPS        FT-LBS         PF
10          611        15.03       
9           613         15.13   
8         614         15.18       
7           615         15.23        
6          616         15.28       
5           615         15.23       
4           620         15.48         
3          616         15.23       
2           621         15.53       
1           624         15.68   

Average: 616.5 FPS
SD: 4.0 FPS
Min: 611 FPS
Max: 624 FPS
Spread: 13 FPS
Shot/sec: 0.0
True MV: 617 FPS
Group Size (in): 0.00

mrbulk:
Great results, thanks for sharing! Caldwell makes some fine products.

Mr.P:
Also have a Caldwell (the other kind with the lights on the bottom).

I figured out that errors are all about shot placement which you probably know. I get zero errors if I center my shots and shoot closer to the "body" of the chronograph where the sensors are housed and father from the light strips / diffusers.

I had an unreliable muzzle clamping chrony and although it serves my purposes fine, it is nice to be able to just shoot through a device separate from the gun. 

Anyway, enjoy!

mobilemail:
I have one of the inverted Caldwell chronies too, in general I really like it. I have found that it can be finicky outdoors if it is under the trees with light coming and going. Much better in steady light, or even indoors.

singleshotcajun:
I bought mine  February 2021 and tested and tuned most of my air rifles, worked great. Lately my my target model QB .22 has been acting weird shooting all over the place even in 70 plus degree weather. I set up my chrony yesterday after it has been setting in the house for about a year and now a few weeks out of warranty. New battery and no reading at all. I shoot from a covered patio and remembered that I needed to have the chrony on the edge of my patio so it got a little light for it to work. Yesterday it was overcast so I am hoping it will work on a sunny day . I will rebuild my QB anyway but just wanted to use the chrony to troubleshoot.

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