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Thread: Velocities of ammo thorugh my 12.5 barrel

  1. #1
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    Velocities of ammo thorugh my 12.5 barrel

    Here are some velocities from my Denny’s 12.5 Operator barrel 1/7 twist with no suppressor.Not my chrono, owner of the chrono measured what look to be about 15 feet, temperature was 99 degree's and a elevation 1000 feet. Q3131 is smoking through the 12.5.

    Winchester Q3131 55gr 5.56mm 5 shots
    1. 3004
    2. 3026
    3. 2943
    4. 2996
    5. 2986

    High-3026
    Low-2943
    Average-2991

    Winchester 62gr 5.56mm 5 shots
    1. 2899
    2. 2898
    3. 2933
    4. 2898
    5. 2912

    High-2933
    Low-2898
    Average-2914

    Black Hills 68 OTM .223 Blue box 4 shots
    1. 2551
    2. 2585
    3. 2559
    4. 2531

    High-2585
    Low-2531
    Average-2556

    Black Hills 75 OTM .223 Red box 5 shots
    1. 2503
    2. 2519
    3. 2510
    4. 2529

    High-2529
    Low-2503
    Average-2515

  2. #2
    Join Date
    Sep 2007
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    Quote Originally Posted by TheDutchman View Post
    Q3131 is smoking through the 12.5.

    Yeah it is. That's a pretty good velocity.
    "What would a $2,000 Geissele Super Duty do that a $500 PSA door buster on Black Friday couldn't do?" - Stopsign32v

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