7mm Rem Mag rechamber?

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by MSU Marksman, Apr 19, 2008.

  1. MSU Marksman

    MSU Marksman Well-Known Member

    Messages:
    197
    Joined:
    Jul 15, 2007
    Can a 7mm Rem Mag be re-chambered to 7mmSTW or 7mmRUM without having to set the barrel back? Thanks in advance.
     
  2. redbone

    redbone Well-Known Member

    Messages:
    688
    Joined:
    Jul 3, 2005
    .



    I would go with the 7 MM STW you will like it

    ,
    Redbone
     

  3. w2553077

    w2553077 New Member

    Messages:
    2
    Joined:
    May 8, 2011
    Why would you? what can you do with it that you can"t with what you already have? The Rem mag will take you into elk and black bear hunting and the others are really not any more sufficient for real dangerous game...... sincerely curious!
     
  4. Hired Gun

    Hired Gun Well-Known Member

    Messages:
    1,537
    Joined:
    Apr 21, 2003
    Looks like you could rechamber to the 7 RUM without a set back. Then is your action or magwell capable of this much longer cartridge?
     
  5. shortgrass

    shortgrass Well-Known Member

    Messages:
    1,992
    Joined:
    Mar 31, 2010
    Barrel, 24" long? Ya' really need 26" to get the most of a STW or UM. Factory barrel? It may be just me, but I won't spend the time or money to re-chamber one thats' mine.
     
  6. backwoods83

    backwoods83 Well-Known Member

    Messages:
    2,206
    Joined:
    Jan 8, 2011
    I'm going with the other post, Why? A 7mm rem mag will run the heavy weights at an appropriate speed, all you stand to gain is 250fps (stw) or 400fps (rum) but in turn you'll be using 15-25grns more powder, your barrel won't survive even half as long and brass is more exspensive and harder to find, not to mention limited to remington and nosler. But if you think you must either can be done but as mentioned both are 3.6"+ length cartridges.
     
  7. Bart B

    Bart B Well-Known Member

    Messages:
    2,483
    Joined:
    Dec 25, 2005
    You probably could, but the chamber reamer may need an oversize pilot. If the 7 Rem Mag barrel's got over 800 rounds through it, the throat may well be enlarged such that an oversize pilot is needed to center the new chamber on the bore..

    After this is done, the accuracy probably won't be any better than the original chamber produced. And it'll wear out faster 'cause more powder's burned for each shot.

    I'd stick with the original chamber until the barrel's worn out and accuracy's no longer what you want. Then rebarrel to the larger round. I'd check magazine length to be sure the new ammo both fits and feeds reliably from it.
     
  8. noneck180

    noneck180 Well-Known Member

    Messages:
    159
    Joined:
    Sep 16, 2009
    He probably figured it out 3 years ago, when he started this thread.
     
  9. w2553077

    w2553077 New Member

    Messages:
    2
    Joined:
    May 8, 2011
    Yeah but others may want to know the same thing, even now!