Sierra 7mm Rem Mag load data needed

Discussion in 'Reloading' started by Mada, Feb 26, 2012.

  1. Mada

    Mada Well-Known Member

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    Sep 20, 2011
    Does anybody have Sierra's load data for the 168 gr SMK using H4831 and H1000

    Thanks :)
     
  2. J E Custom

    J E Custom Well-Known Member

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    Jul 29, 2004
    When I shot long range matches I used 65.5 grains of H 4831 and for the max velocity
    I used 67.5 grains(This is well over a maximum load and should be approached with caution).

    The chamber "MUST" have free bore to shoot the 67.5 gr load.

    The new H4831sc should work very well but start around 64 grains.

    I never tried H 1000 because of 4831 group size.

    J E CUSTOM
     

  3. Mada

    Mada Well-Known Member

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    Sep 20, 2011
    I dont have a chrony.. What barrel length did you have and what was the approximate velocity of the load ?
     
  4. J E Custom

    J E Custom Well-Known Member

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    My barrel was 29.6'' and velocity with 65.5 grains of H-4831 was 3140 ft/sec using a rem
    9 1/2 m primer.

    Standard deviation for load 1 was 8 ft/sec and for the hot load it was 9 ft/sec. I tried the fed 215
    and SDs went to high teens(17 to 19). Velocity increased almost 30 ft/sec and accuracy fell off
    to 3/4 MOA and occasionally threw fliers.(The primer was to hot for this powder and load.

    The hot load(Not recomended because it will sometimes blow the primer) was 3255 ft/sec
    with the same primer.

    Both loads shot well under 1/4 MOA and the only time I used the hot load was in poor conditions
    and the ammo had to be kept cool.

    J E CUSTOM