Mating 300 RUM Barrel to a 300 WM Action

Discussion in 'Gunsmithing' started by MontanaRifleman, Jun 10, 2008.

  1. MontanaRifleman

    MontanaRifleman Well-Known Member

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    If someone were to have a barrel chambered to the 300 RUM case and mate it with a 300 WM action and reciever, how feasable would it be to shorten the throat so that the cartridges could be seated to 300 WM length and still use the magazine?

    Any other issues here besides cartridge length?

    Will a shorter throat affect accuacy or burn out faster?

    Good idea or bad idea?
     
  2. Stormrider

    Stormrider Well-Known Member

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    I don't see the point. You're wanting a Magnum length cartridge to fit in a standard length magazine. You'll have to cut off .200 inch from the RUM case and reform the neck and shoulder to fit it in the magazine and that's just the cartridge. You'll also have to shorten the chamber and re contour the magazine. Probably more, but these are all I can think of right off hand.
    More trouble than it's worth. IMHO
     
    Last edited: Jun 10, 2008

  3. MontanaRifleman

    MontanaRifleman Well-Known Member

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    I don't want to change the basic shape of the case, just shorten the throat to accomadte a deeper seated bullet. That is it in a nutshell.

    My question is, is it feasable? Can a blank barrel be reamed to a 300 RUM with a shortened throat, approx .25 shorter.
     
  4. Stormrider

    Stormrider Well-Known Member

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    I'm not sure I understand what you want to do, now.
    Do you want to shoot the 300 RUM cartridge in a 300 WM action?
    Or do you want to shoot the 300 WM cartridge in a rechambered 300 RUM bbl?
    As far as throating goes, you can throat any way you want.
     
  5. MontanaRifleman

    MontanaRifleman Well-Known Member

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    I want to shoot the 300 RUM cartridge (seated to the 300 WM OAL) in a 300WM action. There is a forum member here who is doing that, but his barrel is chambered to the stnd 300 RUM, including throat. I just want to shorten the throat if possible, which I figure it is, but I'm not a smith.
     
  6. royinidaho

    royinidaho Writers Guild

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    I'd say it's way too much trouble, thus expense, for what you end up with.

    I shoot a 300 Rum barrel on a 338 Win Mag (I believe all the Rem 700 Long actions are the same length for the Magnums).

    However it is a single shot configuration. Plate glued in and an ADL type stock.

    The conditions under which a second shot is taken usually aren't the best.

    If I had a 300 Win Mag I'd stick with it rather than consider using a reduced case capacity. What would be super, I think, would be to chamber for a 300 Win Mag necked up to 338 which may be a more straight forward way of gettin' 'er done.
     
  7. Rustystud

    Rustystud Well-Known Member

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    Look at prints of each cartridge..

    You can have a chamber reamer made with any throat (short) you want and use a throating reamer to open it up to the desired length. Many gunsmiths buy their reamers with a minimal throat and use throating reamers regularly to cut the throat to the desired length.

    You can also buy multiple length boxes of most bolt rifles.

    Remember you can not fit an elephant in a match box.

    Rustystud
     
  8. Stormrider

    Stormrider Well-Known Member

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    What rife? If a Rem 700, then yes you can. All Rem 700 long actions are the same length. You'll need a new magazine box, though.
    For a Win M70 I don't think so. The Win action is too short.
     
  9. MontanaRifleman

    MontanaRifleman Well-Known Member

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    Hmmm.... Kinda like the EDGE, but only with a 300 WM case instead of a 300 RUM case? If I went with a 338, I would probably do this in the 338 WM action, with the 338 RUM chamber, which I am considering.

    Thanks
     
  10. MontanaRifleman

    MontanaRifleman Well-Known Member

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    I don't think it's an issue in this case.

    Thanks
     
  11. MontanaRifleman

    MontanaRifleman Well-Known Member

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    I don't want a Rem action.