Kestrel Meters Ballistics Official Thread

waveslayer

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  • Mar 6, 2012
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    Interesting Observation: Kestrel 5700 Elite Ver 1.42
    Gun: 300NM, MV 3004fps, DM Custom, BC 1.000, BW 230gr (Berger OTM Hybrid), BD .308, ZR 100yds, BH 2.20in, ZH 0.00, ZO 0.00, RT 1:10.00in, Eunit mil, Wunit mil
    Target: TR 1768 yds, DOF 91 deg, Ideg 0, Icos 1.000, TS 0.00,
    Environment: UPDATE LIVE, Lat 40deg, Temp 77F, SP 29.02, RH 53%, Dalt 2410 ft, Spin drift ON, Wcap ALL TARGETS ... * Shooting location about 950 asl, 40deg 10 min N

    I was working up a wind rose for an upcoming event and the kestrel povided the following for 1768yds DOF 91 deg
    Wind change set to DOF
    Wind direction set (manually) to 1 deg the following corrections are given
    Wind 1deg 0mph W 0.43L, Wind 4mph W 0.42L, Wind 8mph W 0.40L, Wind 12mph W 0.38L, Wind 16mph W 0.36, Wind 20mph W 0.34L

    That should be a full value wind coming from the left of the target line (assuming I have set the parameters correctly). Why the minor windage change from 0 to 20mph wind?

    Dumb question, spin drift turned on and Coriolis on? Trying to help diagnose, interesting
     

    Kestrel Ballistics

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    Feb 2, 2018
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    kestrelinstruments.com
    Interesting Observation: Kestrel 5700 Elite Ver 1.42
    Gun: 300NM, MV 3004fps, DM Custom, BC 1.000, BW 230gr (Berger OTM Hybrid), BD .308, ZR 100yds, BH 2.20in, ZH 0.00, ZO 0.00, RT 1:10.00in, Eunit mil, Wunit mil
    Target: TR 1768 yds, DOF 91 deg, Ideg 0, Icos 1.000, TS 0.00,
    Environment: UPDATE LIVE, Lat 40deg, Temp 77F, SP 29.02, RH 53%, Dalt 2410 ft, Spin drift ON, Wcap ALL TARGETS ... * Shooting location about 950 asl, 40deg 10 min N

    I was working up a wind rose for an upcoming event and the kestrel povided the following for 1768yds DOF 91 deg
    Wind change set to DOF
    Wind direction set (manually) to 1 deg the following corrections are given
    Wind 1deg 0mph W 0.43L, Wind 4mph W 0.42L, Wind 8mph W 0.40L, Wind 12mph W 0.38L, Wind 16mph W 0.36, Wind 20mph W 0.34L

    That should be a full value wind coming from the left of the target line (assuming I have set the parameters correctly). Why the minor windage change from 0 to 20mph wind?
    Remember that WD is a relative direction to the Direction of Fire where as the DOF is an absolute direction. So essentially you inputted a headwind. To get a full left wind, you would need to set the DOF to 91 and WD to 270.
     

    SmileMaker

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    Nov 27, 2004
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    Thanks I figured it had something to do with wind direction and that somehow I was getting a headwind solution, (y)


    Thanks for saving me a lot of head scratching and ammo.
     
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