7mm SAUM load data

Discussion in 'Reloading' started by nick197777, Jul 20, 2012.

  1. nick197777

    nick197777 Member

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    May 9, 2012
    I'm looking for some load data. I bought a sierra load book, and to my surprise there isn't any on the 7mm saum. (I know I should have looked at the load choices on the back of the book)

    I'm not sure if I am being too picky or too cheap? Just trying to use what I have available.

    I'm using a 162 grain match hornaday CCI200 primer, and RE19 powder. I was thinking to start at 55gr for my powder charge, what do you all think? Or should I change to a different powder where data is more available for this combo. I'm more interested in the lower pressure powders (trying to preserve my barrel)I guess I like accuracy, over velocity.
    Thanks for any help.
     
  2. Jokostel

    Jokostel Well-Known Member

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    I would start at 55.. Alliants site notes that 60 is max..
    I would also entertain RL22.
    As far as Primers go, anything over 60 or a ball powder I use a magnum cap.... some may disagree with me, but I find I get more consistent velocity and lower ES and better accuracy when I do this.
     

  3. Shortmagman

    Shortmagman Well-Known Member

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    I would agree with what Jokostel said. I have had quite a bit of experience loading a 7mm SAUM. Here are some of my experiences.

    I used RL-19 with 140 grains Accubonds, however I think it will work with the 162 Hornady bullets. As has been stated the Alliant Web site lists 60 grains as Max with a 160 Speer bullet, so you should be able to start at 55 grains and work up.

    With my gun I have used IMR-7828 with 160 Barnes TSX's and 168 grain Sierra Match bullets.

    I have all ways used WLRM primers when loading the 7mm SAUM. I am sure that you could get by with standard rifle primers with some powders such as RL-19, and it may give you better accuracy. In fact the Alliant web site shows that they used CCI200 in developing loads .
     
  4. nick197777

    nick197777 Member

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    Thank you for your input. I'm a little skeptic in guessing on a starting charge. (an ounce of prevention is better than a pound of cure.) Out of curiosity, when you see a shiny stripe going from the primer hole to the outer edge of the base of a case what does it mean? It seems to match the slot the ejector finger comes through on the bolt face. I get this no matter what load data I use, is it the brass lot I'm using? Is it a sign of higher than normal pressure?
    Thanks again
     
  5. Jokostel

    Jokostel Well-Known Member

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    Rule of thumb is start 10% back from what the book shows as max.
    This should allow safety with powder,primer,case,bullet lot differences.
    Brass flow/stripes/hard lift are ALL signs of a hot charge or length issue with proper charge causing a spike in pressure.
    There "should" be NO visable issues with the case and the bolt should lift with a single finger... Not any major effort.
     
  6. Outlaw6.0

    Outlaw6.0 Well-Known Member

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    I have some data from Berger if you would like, let me know.

    168 Grain Bullet: RE 22-- 56.5grns 2767fps Max-59.3grns 2902fps 99.0% PSI 55438


    Info for RL-22, they did not list info for RL-19