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Ruger long action caliber choice?

Discussion in 'Maintenance & Gunsmithing' started by chainsaw, Feb 11, 2013.

  1. chainsaw

    chainsaw East side of Or. Active Member

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    Hi all,I have a Ruger m77 long action that I want to rebarrel,I was thinking 338 ultra mag.The gun used to be a 7mm mag.Is the action long enough for the 338rum cartridge?will I need to do anything to the bolt face,or should I expect to replace the bolt?
     
  2. sneakboxer

    sneakboxer NW OR Active Member

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    I'd go with a 338win mag. Ruger has chambered them in the past in this rifle and the case is nearly identical but necked up and a COL a little longer by .11in. The bolt face looks like its .002in too small for the RUM. The RUM will only get you a few FPS and may require some serious work to feed properly. Your magazine box may limit the COL and the resulting loss of case capacity would cancel the minor gains over the 338win mag. I would bet that win mag brass would also be easer to find and cheaper too. It would be a good project anyway you go, best of luck.
    As per my Hornady book:
    7rem mag
    head: .532in
    case: 2.5in
    COL: 3.290in

    338win mag
    head: .532in
    case: 2.500in
    COL: 3.400in

    338RUM
    Head: .534in
    case: 2.760in
    COL: 3.600in
     
  3. chainsaw

    chainsaw East side of Or. Active Member

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    Thanks sneakboxer,I have a 338 wm,so Im thinking 458 mag.then sell it.thanks for the info.
     
  4. MountainBear

    MountainBear Sweet Home, OR Well-Known Member

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    Unless you're bored and looking for a project to do, if you are going to sell the project anyway, it might be a good idea to sell just the action. You never get your money back out of a custom project and if you sell just the action, then someone can turn the gun into their idea of what they want, rather than settling for your idea (not that your idea is bad, just acknowledging that everyone has vastly different ideas for projects).
     
  5. chainsaw

    chainsaw East side of Or. Active Member

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    You're absolutely right MountainBear,I've decided to do a 338wm.Looking for a factory barrel to put on it now and just keep the rifle.I suppose a guy can't have too many 338's.
     
  6. READYPRO1

    READYPRO1 CENTRAL OREGON Member

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    I think a 375 Ruger would be a great choice and the bolt face would work fine
     
  7. MountainBear

    MountainBear Sweet Home, OR Well-Known Member

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    Learned the hard way...

    I've got a safe full of projects that, even with doing the work myself, I could never get out of them from what I have in them...
     
  8. sheepdip

    sheepdip Redland Well-Known Member

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    .338 win mag. because its fun to watch the newbs shoot them:thumbup:
     
    chainsaw and (deleted member) like this.