Rebarreling 7wsm into 7saum??

Discussion in 'Long Range Hunting & Shooting' started by nctta, Nov 30, 2012.

  1. nctta

    nctta Well-Known Member

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    Will M70 7WSM CRF action work well with being chambered in 7SAUM?
     
  2. SavageShtr

    SavageShtr Well-Known Member

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    That should work just fine, the WSM and the RSAUM are basically the same with the RSAUM being a little shorter. Good luck with your build!!
     

  3. nctta

    nctta Well-Known Member

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    I realize there's not much ballistic separation between the two but I'm planning a long range build and from what I've seen barrel life and brass quality seem to favor the 7RSAUM.
     
    Last edited: Nov 30, 2012
  4. 4bycamper

    4bycamper Well-Known Member

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    My M 70 CRF in 270 wsm is scheduled for a new barrel soon. I already have a 7 saum so just for grins I slapped a 7 saum empty brass into the M 70 mag. It fed with no problems whatsoever.

    It fed so good that maybe I should have rebarrelled the M 70 into 7 saum and turned the Browning into something else. :D
     
  5. geargrinder

    geargrinder Well-Known Member

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    What are you really looking for? Is your WSM shot out? I don't think see much improvement to be made. Is this a Christmas present to your gunsmith?:D

    Barrel life is most influenced by pressure and powder charge. You're getting longer barrel life with the smaller powder charge. You're also getting less velocity.

    What better quality brass are you getting for the RSAUM? All of my WSM brass says Norma on the head. Even my 7mmWSM's.
     
  6. 4bycamper

    4bycamper Well-Known Member

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    My 270 wsm isn't jaw dropping accurate any more, so time for a new barrel.

    I recently retired 1/2 of my Norma 270 wsm brass for neck cracking...

    Just saying...
     
  7. nctta

    nctta Well-Known Member

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    The barrel is a factory barrel that I want to replace because I want a more accuracy. Ultimately I want an efficient round that doesn't require to much work reloading for.
     
  8. COBrad

    COBrad Well-Known Member

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    We're talking chocolate or vanilla here, either way it's ice cream. Personally I don't see anything one has to offer over the other. What is the best brass available for both? I know the Norma I use in my 270 WSM is very good brass. I check neck thickness in new brass and discard any that has greater than .001 variation. The last 100 Norma I went through came in at 96 if I recall.
     
  9. nctta

    nctta Well-Known Member

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    Post was never intended to debate the merits of one vs the other. I agree there is little difference.

    I just want to know how the 7rsaum will feed in a m70 CRF action.

    I have access to a 7saum reamer.. I will have to buy or rent a 7wsm reamer and gauges
     
    Last edited: Dec 1, 2012
  10. COBrad

    COBrad Well-Known Member

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    Yes, that is the subject.
    As you already know, one should feed as well as the other.

    I think I am spending too much time here. I'm laid up with a back injury, and this is my favorite pastime, now that I will be confined to a chair for a few months. My wife is asking if I have been on this website all day, and I am losing track of the subject.... signing off, but I'll be back.
     
  11. liltank

    liltank Well-Known Member

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    Have you watched the video of the 3 guys shooting 2300yds. The 7SAUM gets 3 hits in a row where the 338 struggled. However, the 338 can be a lot better or just the same. Depends on the trigger man, load development, and conditions. Personally, I would definitely go 7SAUM if you have access to a reamer. That is the one caliber in 7mm that I truly researched thoroughly between all the different 7mm. The 7SAUM according to research is the best bang for the buck when it comes to efficiency and barrel life.