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Chair Gun Experts

Discussion in 'Anything Airgun Related' started by bucketboy, Jan 26, 2020.

  1. bucketboy

    bucketboy Big Poster

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    Could one of you chair gun expert load this into the calculator and give me the results


    .177 8.4grn @ 780fps scope height 82mm (3.25 inches) zero set at 55 yards. What is the drop out at 100yards?


    Thanks. Bb
     
    Blackmax, Redcap 114 and Marky-Boy like this.
  2. Headshotharry

    Headshotharry Engaging Member

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    -20 inch
     
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  3. bucketboy

    bucketboy Big Poster

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    Thanks

    Bb
     
  4. joshua19

    joshua19 Well-Known Member

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  5. GPConway

    GPConway Engaging Member

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    I'm not a chairgun expert (I use MERO these days)
    Depending on the pellet's BC and the environmentals ...

    MERO_1.png MERO_2.png MERO_3.png MERO_4.png

    Hope that helps
    George
     
    Last edited: Jan 26, 2020
    Tim_B likes this.
  6. bucketboy

    bucketboy Big Poster

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    Thank you, I was in an argument with someone at the range yesterday who claimed the drop to be 6’

    I said it would be more like 18”.


    Turns out we were both wrong but he was more wrong than me :loser:


    Bb
     
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  7. Figgy

    Figgy Posting Addict

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    No you were right, if your kill zone is 2" :thumb:
     
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  8. Headshotharry

    Headshotharry Engaging Member

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    It’s a big drop and a big hold over too lol
     
  9. bucketboy

    bucketboy Big Poster

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    Yes indeed but once zeroed (i have enough turrets adjustment in my scope) in perfect conditions my gun is more than capable of shooting good groups even at that range.


    Bb
     
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  10. Headshotharry

    Headshotharry Engaging Member

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    And still hitting at 3.6ftlb at that range, what you firing ?
     
  11. bucketboy

    bucketboy Big Poster

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    my mfr .177 is the most accurate at that range but the data loaded is for my fx impact

    Bb
     
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  12. Figgy

    Figgy Posting Addict

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    Last edited: Jan 26, 2020
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  13. Figgy

    Figgy Posting Addict

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    Bucketboy it would be interesting to see just what it does work out at from your gun on a still day.

    Out of curiosity from my impact at 567fps with JSB 15.89 with same zero and end distance scope height of 8cm would have a drop of 34.4"
     
    Last edited: Jan 26, 2020
  14. GPConway

    GPConway Engaging Member

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    Your results would be much the same as MERO's if we were using the same Ballistic Coefficient, Drag Law, Ambient Temperature, Ambient Pressure and Relative Humidity. But we're not. :rolleyes:

    George
     
  15. bucketboy

    bucketboy Big Poster

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    me too!

    what I normally do on my rapid with a sfp scope...

    Max out the turret, max out the magnification (25x) put the cross hair on target and take a shoot.

    with the cross hair still on target zoom out until the bottom mill dot is on poi. Effectively, this shrinks the image to coincide with dots.

    using the bottom mill dot now as your aiming point, you should be almost perfectly on target with just your second shot.

    Bb
     
  16. Figgy

    Figgy Posting Addict

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    Yep ranging drop with your scopes mag, works for me.
    With new ballistic apps you can enter your scope and reticle, then play with the mag in the app to get the same as you in the field.
     
  17. funkedup

    funkedup Engaging Member

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    I said it would be the top of the bottom post on the ret.
     
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  18. GPConway

    GPConway Engaging Member

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    If you left the elevation turret alone on the zero range then twiddled the mag to align the bottom mil-dot, MERO'd provide you with all of the intermediate intercepts too - as per my previous post.
    This doesn't work with FFP scopes of course (which is one of the reasons I don't own any).

    George
     
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  19. Figgy

    Figgy Posting Addict

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    George that Nero app looks good.
     
  20. GPConway

    GPConway Engaging Member

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    Yeah, well ... it impresses me. :)

    The Windoze/macOS/Linux version can be downloaded from my web-space here or the Android version from my web-space here or my DropBox here (along with other stuff of interest).

    George
     
    Figgy likes this.

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