imr 7828ssc in 7mm-08

Discussion in 'Reloading' started by chad, May 23, 2014.

  1. chad

    chad Well-Known Member

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    Anyone have any load info on this? I was going to use H4350 but everyone has told me it is not temperature stable.

    So I need to try either 7828ssc or H4831sc. Anyone have load info on the 7mm-08 and 140 to 150 grain bullets?
     
  2. MudRunner2005

    MudRunner2005 Well-Known Member

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    I use Varget for 7mm-08.

    Berger manual says with 140gr bullets:

    Varget

    Start: 37.5
    Max: 41.7

    IMR 4350

    Start: 40.5
    Max: 45.0

    H4350

    Start: 41.5
    Max: 46.0
     
  3. morcey2

    morcey2 Well-Known Member

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    Someone told you that H4350 wasn't temp stable? H4350 is extremely temperature stable .... and extremely unavailable, at least around here. It's one of my favorite powders because if its temperature stability. It's also just about perfect for the 7mm-08. I use it in 7x57 with 140 & 145 gr bullets and it works great. I don't remember the exact numbers (they're written down at home) but I only had a difference of about 15 fps between shooting at 20* and the same loads/same gun at 90* with no discernible difference in POI. That was with 140 gr BT. I'd expect the same from H4831sc.

    IMR4064 in the same gun with 120 gr NBTs gave a 100-ish fps increase between 20* and 90*. Loads were developed in January/February and shot again in August of last year. 4064 is still my go-to powder for pretty much everything, I just have to be careful of the temperature issue.

    Matt
     
  4. g0rd0

    g0rd0 Well-Known Member

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    I have been told that you can take a load by weight not volume of imr7828 and sub with the same weight of imr7828ssc. But, be sure that the load is in grains not volume as the ssc is a finer cut with the same burn rate.
    I have also been told that the ssc throws more consistently than the normal IMR powder.
    Start low and work up you should do just fine.
     
  5. FEENIX

    FEENIX Well-Known Member

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    Sorry but you've been misinformed. Like the H4831/SC, H4350 belong to Hodgdon extreme powder family.
     
    Last edited: May 23, 2014
  6. 280 Man

    280 Man Member

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    There's better powders for the 7/08 than 7828 but if that's all you have then you must make do with it....4350 is good, but H414 is as well, along with W748. IMR4064....The 7/08's Ive had really shined with 4350 either version, with 4064 running a close second..
     
  7. frankinaustin

    frankinaustin Well-Known Member

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    For me, Varget has been the best powder for my little 7mm-08. I'm shooting under half MOA with 42.6 gr of Varget under 145 grain Barnes LRX. (And I'm not that good of a marksman.) Furthermore, I conducted one of those round-robin OCW methods to develop my load, and I have a fairly wide range of charge weights that will put the bullet into the same silver dollar area at 300 yards.
     

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  8. J E Custom

    J E Custom Well-Known Member

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    If you want a good powder for the 7/08 try Varget.

    H 414 is the best in my 7/08 but is heat sensitive.

    7828 is very slow and the 7/08 cant hold enough to get any velocity.

    And as FEENIX said H 4831/sc and H 4350 are both extreme powders

    J E CUSTOM
     
  9. Doublezranch

    Doublezranch Well-Known Member

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    7828 and 7828ssc was designed for 7stw and larger calibers with significant case volume. As J E Custom mentioned the 7mm-08 will not have the case volume to efficently burn that powder. I use H380 with excellent results. Everyone that has chimed in has had very good suggestions. However, I wouldn't use 7828 or 7828ssc in your 7mm-08.
     
  10. chad

    chad Well-Known Member

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    Just lookin for loads with what powder I have. Varget is non existent and h4350 I have and will use it. Loads are close but not tight enough groups yet. Next trip I should have it to half inch easy. I was just told the h4350 wasn't temp stable even though it is in the extreme line. So it's good to hear that it is. Thanks for all the input.
     
  11. J E Custom

    J E Custom Well-Known Member

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    Hear is the list of Hodgdon Extreme powders.

    Extreme Rifle Powders

    J E CUSTOM
     
  12. Dosh

    Dosh Well-Known Member

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    Chad, loaded my grandson's 7mm-08 with H4350 behind 140 Berger VLD's. Shoots 1.16 MOA @ 200 yards. Have never had any temp issues with any Hodgdon Ehtreme powders. I have had enough issues with IMR 7828SSC to cease using it. Good luck
     
  13. MudRunner2005

    MudRunner2005 Well-Known Member

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    That's strange... I've never had a single issue with 7828 SSC. Actually, 7828 SSC and Varget are the 2 most consistant powders I use. I've had more temp stability issues with RL19, RL22, and H1000 to make me quit using them almost completely.

    I only use Aliant powders for fire-forming cases for my AI's now, because of how temp unstable they are.

    And H1000 has caused me ill affect with only about a 15-degree temp swing.