223 90gr Atip update

Discussion in 'Small Stuff--22s, 20s, and 17s' started by Nightraider, Mar 23, 2020.

  1. Nightraider

    Nightraider

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    Criterion 27" 7t HV
    Kelbly Atlas 223
    MPA BA chassis
    H4895
    Federal GMMAR
    LC17 case
    90gr Atip
    .291g7 BC

    I slowed the 90s down from 2950 to 2860 and am jumping roughly .055" with an oal around 2.55.

    5 @ 420y

    IMG_20200322_190826_976.jpg IMG_20200322_190826_994.jpg IMG_20200322_190826_979.jpg 20200322_140651.jpg IMG_20200322_190827_028.jpg
     
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  2. Hotshot

    Hotshot

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    Too bad you threw the flier at 2:00 o'clock
     
  3. PatMiles

    PatMiles Gold $$ Contributor

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    Tell us about the design in the upper circle of your Kestral. :rolleyes:
     
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  4. Nightraider

    Nightraider

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    The joy of owning a fiber laser and friends with twisted funny bones.
     
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  5. PatMiles

    PatMiles Gold $$ Contributor

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    I preferred to be referred to as having a funny bone that is as screwed up as a football bat! :D
     
  6. Shootin25

    Shootin25 Silver $$ Contributor

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    Long throated?
     
  7. paperpuncher

    paperpuncher Silver $$ Contributor

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    I think he posted .125" in another thread
     
  8. Nightraider

    Nightraider

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    But I'm jumping about .055
     
  9. Shootin25

    Shootin25 Silver $$ Contributor

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    At 2.55 OAL I may be able to mag feed these...

    @Nightraider are you single loading?
     
  10. Nightraider

    Nightraider

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    No, AICS magazines
     
  11. Shootin25

    Shootin25 Silver $$ Contributor

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    Thanks .
     
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  12. Ned Ludd

    Ned Ludd Gold $$ Contributor

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    Do you by any chance have access to a LabRadar? It would be interesting to determine the G7 BC from the velocity drop data for comparison with the manufacturer's published value. In my hands, the G7 BC of pointed 90 VLDs typically run about 0.290. I have also played around a bit with the Hornady 88 ELDM, which I suspect has a very similar design to the 90 A-Tip. To my surprise, the 88 ELDM LabRadar velocity drop data routinely gave me a predicted G7 BC greater than 0.300, typically 0.302 to 0.305. It wouldn't surprise me if the 90 A-Tip was even higher. They look to be shooting quite well in your hands.
     
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