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Mosin re-barrel?

Discussion in 'Gunsmithing and Repairs' started by Njal Thorgeirsson, Feb 4, 2012.

  1. Njal Thorgeirsson

    Njal Thorgeirsson Member

    Feb 14, 2011
    Colorado, USA
    Long story short I wanted to update/sporterize an old m91/30 (I drilled/tapped the reciever and bought a very nice scope for it), but I ended up with a rifle with a garbage corroded barrel (18+ MOA groups- no joke). So I would like to replace the barrel, but I just don't know where to start.

    What would be your recommendation for a place to look for a replacement barrel, and what would be a general price range I can expect? I'm not looking for another surplus one- I'm looking for a barrel that will make my mosin as accurate as possible (without spending a ridiculous amount of course).

  2. tyeo098

    tyeo098 Senior Member

    Jul 5, 2010
    The Old Dominion
  3. NCsmitty

    NCsmitty Mentor

    Jun 29, 2008
    North Carolina
    That can happen, but not knowing your level of expertise, or how much that you wish to spend, it's difficult to recommend anything.

    The Mosin 7.62x54R is a bit of an oddball, and the magazine is designed around that round. Anything different can give you fits to feed and such.

    If you purchase an unthreaded barrel blank in 30 caliber(.308), you can have it threaded and chambered for the 7.62x54R, and load regular .308" bullets in the cases instead of .311, if you reload.

    Unfortunately, A&B standard profile 30 cal barrel blank is out of stock at midway.


    Other brands will likely be double the price or more.

    For the cost of rebarreling, you can probably buy at least a couple more Mosins. Think about it.

  4. rcmodel

    rcmodel Member in memoriam

    Sep 17, 2007
    Eastern KS
    No corroded barrel can make a rifle shoot that bad.
    You have muzzle damage of one type or another.

    First thing I would do is, clean all the crap & jacket fouling out of it with JB Bore Paste.

    Then take it too a gunsmith and have him re-crown the muzzle.

    (Or counter-bore it an inch or so if needed to get past any cleaning rod wear at the muzzle.)

    I would bet money your muzzle rifling is worn away into a funnel shape.
    And I would bet money your barrel will shoot as good as it ever did when you complete cleaning, crowning, or counter-boring it.

    DuP post here:

    Last edited: Feb 5, 2012
  5. Clark

    Clark Senior Member

    Jan 3, 2003
    Where I5 meets the rain forest
    I have been rebarreling Mosin Nagants for 10 years, and only got 5 of them done.

    Cutting the threads and chamber is like any other rifle.
    The extractor relief cut is a pain.
    Not as bad as a Sav99, but harder than most.

    The reworked VZ59 machine gun barrels that Tennessee Guns was selling a few months back had threads and extractor relief cut for Mosin Nagant actions.
    It would have made life easier if the had done nothing to the barrels. Each Mosin Nagant receiver seems to be clocking differently for extractor relief.

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