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Thread: Second experiments with the 6.8mm SPC

  1. #1
    Member Float Pilot's Avatar
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    Default Second experiments with the 6.8mm SPC

    6.8 x 43mm Remington SPC Page two
    Conditions:
    Rifle: Stag 16 inch flat-top, 1 in 10 twist SPCII chamber, A2 buttstock with Tubbs flat spring
    Sights: fixed 6 power Leupold.
    Range 100 yards
    Temp: 32 degrees F , 0 C
    Light: Flat fading light on snow.

    LOADS:
    A:
    Bullet: 100 grain Sierra sp, flat base
    Powder: 30.0 grains, H-322
    Primer: Remington 7 1/2 bench rest small rifle, hand seated
    Brass: SSA
    COL: 2.240 inch Lee Factory Crimp

    Velocity average: 2,576 fps 40 fps ES
    1.50 inch group with last shot flyer to 2.5 inch. No pressure signs

    B:
    Bullet: 100 grain Sierra sp. flat base
    Powder: 30.0 grains, H-322
    Primer: CCI-400 small rifle, hand seated
    Brass: SSA
    COL: 2.240 inch med roll crimp.
    Velocity average: 2,556 fps 9 fps ES

    0.35 inch group with last shot flyer to 0.80 inch. Flat Primers


    C:
    Bullet: 110 grain Hornady Flat Base, Hollow Point
    Powder: 29.0 grains,H-322.
    Primer: CCI-400 small rifle, hand seated
    Brass: SSA
    COL: 2.260 inch. Lee Factory Crimp
    Velocity average: 2,500 fps 60 fps ES

    3.75 inch group, Flat Primers NOT A GOOD LOAD

    D:
    Bullet: 110 grain Nosler Accubond Boat-Tail
    Powder: 29.0 grains H-322
    Primer: CCI-400 Small Rifle hand seated
    Brass: SSA
    COL: 2.260 inch Lee Factory Crimp
    Velocity average: 2,500 fps 15 fps ES

    1.0 inch group with last shot flyer to 1.5 Flat Primers



    E:
    Bullet: 110 grain Hornady V-MAX factory load
    Powder: Factory

    Primer: Factory large
    Brass: Hornady
    COL:
    Velocity average: 2,446 fps 75 fps ES

    2.7 inch group No pressure signs
    Floatplane,Tailwheel and Firearms Instructor- Dragonfly Aero
    Experimental Hand-Loader, NRA Life Member
    http://site.dragonflyaero.com

  2. #2
    Supporting Member AlaskanSD's Avatar
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    Default

    Thanks for posting. I'm considering an LWRC 6.8, but have held off over concerns of ammo price and availability. However, I'm not interested in testing different loads - HA. So if you find a solid performer (B?), I just might do it...

    Keep us posted!

  3. #3
    Member Float Pilot's Avatar
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    Default

    The Barnes Triple Shock and the Nosler Accubond, both in 110 grain, seem to be the most consistant so far. Particularly when using H-322 powder.

    I just posted another list of loads from Sunday.
    Floatplane,Tailwheel and Firearms Instructor- Dragonfly Aero
    Experimental Hand-Loader, NRA Life Member
    http://site.dragonflyaero.com

  4. #4
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    Default

    Looks like "B" is the way to go so far.

    Jim

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