700 ultramag to STW??

Discussion in 'Gunsmithing' started by buzzgun, Feb 1, 2008.

  1. buzzgun

    buzzgun Well-Known Member

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    Trying to help a friend.....he wants a stainless left hand 700 in 7 STW (has tons of brass, dies etc)......we can get a stainless left hand 338 ultramag donor rifle cheap, but I'm wondering if the feed rails will work for the stw case or would they be too wide???

    Anyone rebarreled a 700 ultramag action to a standard belted mag cartridge??
     
  2. J E Custom

    J E Custom Well-Known Member

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    Buzz

    It should work fine but if it doesent then you can go to a
    Watts box Center feed that is easy to install.

    But try the action with no modifications first.

    J E CUSTOM
     

  3. buzzgun

    buzzgun Well-Known Member

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    Thanks, but we don't have the action and need to know before we order the donor rifle. If it won't work with the feed rails as is, we will probably try to find a donor in 300 win or 7 mag......
     
  4. koginam

    koginam Well-Known Member

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    Back in the late 90's we built lots of them for customers.
    It will work without any changes to the rails or the follower. remember that the barrel needs to be at least 26 inches to get the true benefit of the caliber. All mine have muzzle breaks so they are just under 30 inches.
    The 7STW has been one of my favorites for most of 10 years even back when it was a wildcat. I used it in Alaska on browns and on caribou, in Idaho and New Mexico for Elk.
     
  5. buzzgun

    buzzgun Well-Known Member

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    You built them on ULTRAMAG actions in the late 90's???
     
  6. specweldtom

    specweldtom Well-Known Member

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    I think worst case you just get the Std Mag magazine box and follower from Remington and switch them out. The RUM case is larger in diameter and the STW might pop up too quick out of a RUM box. I would try it first, tho.

    Good luck with the project, Tom
     
  7. wnroscoe

    wnroscoe Active Member

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    I beleive the difference between a standard belted case's belt and an RUM, WSM case wall at the head etc. is around .017". With an Ultra Mag Receiver's feed rails being at least .0085" per side larger, a standard belted case may not be held in the mag box as good?? I'd research it closley before I ordered the receiver. Thats just my .02 worth.
     
  8. buzzgun

    buzzgun Well-Known Member

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    That's the whole idea behind this thread.......I want to know from someone that has either done it or knows for a fact it won'r work......
     
  9. LewisH

    LewisH Well-Known Member

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    Why don't you just e-mail or call a riflesmith like Kirby Allen and ask him :confused:
     
  10. buzzgun

    buzzgun Well-Known Member

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    Since Kirby is on the board most days, I figure he will answer if he knows......that's what this particular forum is for.....to ask gunsmithing questions....right???
     
  11. banded

    banded Well-Known Member

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    buzz, guys on here are just giving your there thoughts... calm down.. If you need to know quick, pick up the phone and call Shawn Carlock at Defensive Edge. He can tell you.
     
  12. wnroscoe

    wnroscoe Active Member

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    OK, stop whining. Why don’t you go to Wal-Mart or some where else and purchase one of the cheap, $350.00, 7mmRM's and use that as a donor action???? I simply gave you info I had. My concern is since the feed rails are wider on an RUM than they are on a Belted Magnum it may cause feeding problems. Just how many times has "your friend" needed a follow up shot from an STW anyway?? Lighten up, this only the internet. If the answers aren’t good enough pick up the phone and make a call.
     
  13. buzzgun

    buzzgun Well-Known Member

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    Calm down??? I'm not a bit excited........I simply asked a question.....why would you assume (incorrectly) that I need to calm down???
     
  14. koginam

    koginam Well-Known Member

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    I'm sorry I didn't explain it right we built them on Remington & Sako mag actions. I still don't think you will have any problems but I know you won't if you go with a 416 mag action.