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90 Grain Sierra HP in 6.8 SPC experiments

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  • 90 Grain Sierra HP in 6.8 SPC experiments

    6.8x43mm Range Report 90 Grain Sierra Hollow Point
    Conditions:
    Rifle: Stag 16 inch flat-top, 1 in 10 twist SPCII chamber, A2 buttstock with Tubbs flat spring
    Sights: Fixed 6 power Leupold. FXIII 42mm Heavy Duplex
    Range 100 yards
    Temp: NEG 08 degrees F , Negative 22 C, Light wind
    Light: Flat fading light on snow.



    1.
    Bullet: 90 grain Sierra Hollow Point, flat base
    Powder: 30.1 grains, H-322.
    Primer: CCI-BR-4 bench rest small rifle, hand seated
    Brass: SSA
    COL: 2.245 inch Lee Crimp.
    Velocity average: 2,705 fps 40 fps ES

    1.5 inch group with last shot flyer to 2 Does not load well No pressure signs


    2:
    Bullet: 90 grain Sierra Hollow Point, flat base
    Powder: 33.5 grains, AA-2230
    Primer: CCI-BR-4 bench rest small rifle, hand seated
    Brass: SSA
    COL: 2.245 inch Lee Crimp.
    Velocity average: 2,647 fps 43 fps ES

    0.5 inch group with last shot flyer to 0.75 Does not load well No pressure signs


    3:
    Bullet: 90 grain Sierra Hollow Point, flat base
    Powder: 27.5 grains, RL-7
    Primer: CCI-BR-4 bench rest small rifle, hand seated
    Brass: SSA
    COL: 2.245 inch Lee Crimp.
    Velocity average: 2,664 fps 47 fps ES

    1.25 inch group Does not load well Some pressure signs

    4:
    Bullet: 90 grain Sierra Hollow Point, flat base
    Powder: 27.0 grains AA 1680
    Primer: CCI-BR-4 bench rest small rifle, hand seated
    Brass: SSA
    COL: 2.245 inch Lee Crimp.
    Velocity average: 2,645 fps 74 fps ES

    1.0 inch group Does not load well NO pressure signs

    5:
    Bullet: 90 grain Sierra Hollow Point, flat base
    Powder: 28.5 grains H-4198
    Primer: CCI-BR-4 bench rest small rifle, hand seated
    Brass: SSA
    COL: 2.245 inch Lee Crimp.
    Velocity average:
    2,883 fps 24 fps ES
    1.0 inch group including flyers Does not load well HIGH pressure signs
    Has potential for accuracy if it would load without hanging up.


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  • #2
    Interesting, Thank you. Have you done other research on the 6.8 SPC ???

    Any testing with heavier than 115 Gr. ???

    I have a 6.8 SPC pistol (10 1/2" AR-15) I want to wring-out soon.
    "Life Is Either a Daring Adventure or Nothing" - Helen Keller

    Comment


    • #3
      Sorry: found the post on the 130 Gr. and 150 Gr.
      "Life Is Either a Daring Adventure or Nothing" - Helen Keller

      Comment

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