7MM WSM or 7MM RSAUM

Discussion in 'Long Range Hunting & Shooting' started by 700Sendero, May 14, 2015.


Help Support Long Range Hunting by donating:


  1. 700Sendero

    700Sendero Member

    Messages:
    16
    Joined:
    Apr 25, 2014
    Ok guys, first post here. I'm working on a build for a midweight hunting/long range rig. It will be on a Rem 700 short action with a #3 or 4 contour Hart barrel. I'd like some info on the WSM vs the RSAUM. With the limited availability of WSM brass I'm leaning toward the RSAUM. Will I notice the diff. In velocity? Thanks in advance.
     
  2. J E Custom

    J E Custom Well-Known Member

    Messages:
    9,166
    Joined:
    Jul 29, 2004
    The WSM has a slight advantage in powder capacity. With that said there is very little difference in velocity and performance. If brass was not so hard to get for the 7 WSM I would recommend it, but
    if you can find plenty of 7 SAUM brass go for it. Just Buy several 100 rounds before you commit to a build.

    Both the 7 WSM and the 7 SAUM are longer than the 300s so it cant be used for the 7s unless you want to give up some neck length.

    J E CUSTOM
     
  3. AZShooter

    AZShooter Well-Known Member

    Messages:
    2,424
    Joined:
    Dec 12, 2005
  4. 700Sendero

    700Sendero Member

    Messages:
    16
    Joined:
    Apr 25, 2014
    Thanks for the help guys. This pretty much made up my mind to go with the SAUM. Now, does anyone have any idea of velocity out of a 26" tube? Probably will be shooting 162 A-maxs for shooting and 160 Accubonds for my hunting bullet.
     
  5. Ridgerunner665

    Ridgerunner665 Well-Known Member

    Messages:
    553
    Joined:
    Sep 15, 2008
    Something else to consider...

    The 7mm RSAUM is nothing more than a short 280 Ackley... The case capacity is identical.... Well, that depends on bullet being used, but with 160's... Its within .5 grain.

    Brass wouldn't be a worry that way...

    Velocity from either is gonna be over 3,000 fps... 3,050 - 3,075 fps I'd say.

    My 24" 280 Ackley gets 3,003 fps with 160's seated to normal length (3.34")
     
  6. Jaxdialation

    Jaxdialation Well-Known Member

    Messages:
    260
    Joined:
    Aug 31, 2014
    RSAUM brass is very scarce. RSAUM was all the rage on another forum. 6 months later the rifles were for sale.
     
  7. AZShooter

    AZShooter Well-Known Member

    Messages:
    2,424
    Joined:
    Dec 12, 2005
    Bullets.com has NORMA 7 SAUM brass on sale if you are willing to buy 250 cases. (or 2000 )
    Or you can pay full price for boxes of 25.

    Bullets.com
     
  8. 700Sendero

    700Sendero Member

    Messages:
    16
    Joined:
    Apr 25, 2014
    I've found 3 different places with SAUM brass in stock and nowhere has WSM brass. That's why I started looking at the SAUM was brass availability. I like the fact that your burning less powder for really close to the same velocity.
     
  9. Dgd6mm

    Dgd6mm Well-Known Member

    Messages:
    1,242
    Joined:
    Jul 14, 2008
    +1, I have a 7rsaum nitrited barrel, Savage large shank with under 300 rounds down it. I also have a.284 Shehane with 800 rounds down it. When one of these are gone my next 7mm will be a .280 AI.
     
  10. 4bycamper

    4bycamper Well-Known Member

    Messages:
    622
    Joined:
    Apr 11, 2009
    That's pretty much what I shoot out of my 7 saum Browning, along with 168 vld's.
    For a few years this rifle had a 26 inch barrel and I got 2973 average fps with 160 AB.
    This load was easy on the brass and right in the accuracy notch. Last summer I shortened the barrel. Now it's 24.5 in. long. And guess what, velocity didn't change. With an Extreme Spread of 24 fps...any velocity change is lost in the ES.

    Good Luck with your build. Hope you like it as much as I like mine.
     
  11. 4xforfun

    4xforfun Well-Known Member

    Messages:
    1,397
    Joined:
    Oct 1, 2007
    It would be tough build on a short action, don't ya think???
     
  12. Ridgerunner665

    Ridgerunner665 Well-Known Member

    Messages:
    553
    Joined:
    Sep 15, 2008
    True enough... But less of a headache in the long run.
     
  13. 4xforfun

    4xforfun Well-Known Member

    Messages:
    1,397
    Joined:
    Oct 1, 2007
    We have to load the 105 class bullets deep in the 243 Win case to fit in the Rem mag well. You suggest using an even LONGER case with longer bullets in the Rem SA???? lightbulb
     
  14. Ridgerunner665

    Ridgerunner665 Well-Known Member

    Messages:
    553
    Joined:
    Sep 15, 2008
    No.... I'm suggesting sell the short action and get a long one.
     
    Antarcticchamp likes this.