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Thread: A slight case of Chrony fever

  1. #1
    Sharp Shooter

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    Default A slight case of Chrony fever

    I recently bought a new chronograph and am most impressed with this Caldwell technology (blue tooth connectivity wins over pencil paper or keyboard). Instant response and calculations done in the Caldwell phone Ap make life very easy.

    So with a mild case of chrony fever (Jaco tried to cure me) I checked out the stable. Some members are getting a bit long in the tooth but certainly not ready to go to the knackers yard!
    Notably:
    The reliable old Ed breed Russian battle mare, Lelya, produced these figures with JSBs.

    Ballistic Coefficient: 0.0310 Bullet Weight (grain): 15.9 Altitude (FT): 1600 Temp: 20

    # FPS FT-LBS PF
    10 799 22,54 12,70
    9 801 22,66 12,74
    8 801 22,66 12,74
    7 804 22,83 12,78
    6 798 22,49 12,69
    5 798 22,49 12,69
    4 801 22,66 12,74
    3 799 22,54 12,70
    2 802 22,71 12,75
    1 802 22,71 12,75
    Average: 800.50 StdDev: 1.96 Min: 798 Max: 804 Spread: 6 True MV: 800.50

    and even more "ancient" and the very hard worked British thoroughbred EV gave me :

    Ballistic Coefficient: 0.022 Bullet Weight (gr): 8.440 Altitude (FT):1600 Temp: 20
    Shots
    # FPS FT-LBS PF
    9 740 10,26 6,25
    8 738 10,21 6,23
    7 739 10,24 6,24
    6 741 10,29 6,25
    5 743 10,35 6,27
    4 735 10,13 6,20
    3 740 10,26 6,25
    2 737 10,18 6,22
    1 741 10,29 6,25
    Average: 739.33 StdDev: 2.40 Min: 735 Max: 743 Spread: 8 True MV: 739.33

    This EV was modified by Jaco @ Airgunworx many years ago and has had nothing technical done to it since 2009.
    Lelya has had O rings replaced and a bit of Airgunworx magic on the trigger, and that’s about it, it is still producing the power and is more accurate than me by far.
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  2. #2
    REP: WS Airguns

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    I just love my Caldwell!! I use the cable, not sure if my model does support bluetooth.
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  3. #3
    Sharp Shooter

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    I have one to love it on the app you can change f/lbs to some thing called PF any one know what PF stands for ? The no s don’t make any sense to me
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