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Thread: Some Chrono Results - 6920 SOCOM

  1. #21
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    Quote Originally Posted by dookie1481 View Post
    Are those SD's about par for the course with 5.56?
    Yeah, until you get to weighing your charges, that is pretty typical. Less than a third of my chrono'd handloaded batches have an SD of 20 or less. When you do weigh your charges, you have to be with a few kernels of a stick powder before you start getting decent spreads. For competition, I'm within 3 kernels of Re15 before I call it good.

  2. #22
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    Quote Originally Posted by waffentomas View Post
    I finally got a decent day to take the akitas out into the woods with me for some chronographing. So here are some results, a mix of hand loads and factory for anybody who cares. I'll update the thread when I get chance to do more testing.

    First: The tool.



    Sunny, 35 degrees, 1200 feet elevation, Barometer 29.60, Humidity 75%

    All strings are 10 rounds, fired at 15 feet from device.

    Nosler 80gr BTHP 25.1gr TAC

    Avg: 2542
    SD: 57.3
    Spread:129
    Kinetic Energy: 1148


    Sierra 77gr BTHP 22.0gr AR COMP

    Avg: 2427
    SD: 43.8
    Spread: 136
    Kinetic Energy: 1008


    HPR 75gr BTHP

    Avg: 2549
    SD: 44.1
    Spread: 93
    Kinetic Energy: 1082


    HSM 55gr FMJ 5.56

    Avg: 3001
    SD: 42.7
    Spread: 138
    Kinetic Energy: 1100


    Herters steel case 55gr FMJ

    Avg: 2817
    SD: 53.4
    Spread: 130
    Kinetic Energy: 970


    PMC 55gr FMJ

    Avg: 2755
    SD: 97.2
    Spread: 275
    Kinetic Energy: 927


    55gr SP 26.0 gr Varget

    Avg: 2366
    SD: 41.2
    Spread: 117
    Kinetic Energy: 684
    Nice rifle

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