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Thread: 700 Magnum action to feed Ultra-Mag?

  1. #1
    Join Date
    Dec 2003
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    washington.........STATE that is.
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    700 Magnum action to feed Ultra-Mag?

    One of my 338 test platforms is a cannibalized 7MM Mag action.... It's no good to me as a Belted Mag.

    Visually the only difference between belted mag and ultra-mag is the size (diameter) of the feed ramp slot.

    Has anyone re-cut a feed ramp on one of these? Or are there other differences?

  2. #2
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    Besides the width the angle on the bottom has to be changed.

  3. #3
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    May 2006
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    195

    feed ramps

    just interested in what this might entail ?
    gary b

  4. #4
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    Quote Originally Posted by Dave Tooley View Post
    Besides the width the angle on the bottom has to be changed.
    Angle of the feed ramp?

  5. #5
    Join Date
    Jul 2011
    Location
    Minnesota
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    18

    .243 to SAUM Conversion

    Al:
    I converted a .243 700 SA to a 6.5 SAUM using a Wyatt extended box. Besides opening the rails and extending the box mortise 'there are two points at the rail/ramp junction that need to be opened up to allow the cartridge to pass up the feed ramp'. Used a Dremel to merge the two. Just an FYI: I tried to use the standard mag box which should allow three in that box. It would not feed.. Had to change to center feed box which only held two in the Manners stock... All was then good. Rick

  6. #6
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    Quote Originally Posted by alinwa View Post
    Angle of the feed ramp?
    Al,

    The angle on the bottom of the rails has to change to allow the case to stay tucked under. I free hand it with a dremel and abrasive wheel. But then I've I done a few. It's all about geometry. I also put in a longer box.

  7. #7
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    Quote Originally Posted by Dave Tooley View Post
    Al,

    The angle on the bottom of the rails has to change to allow the case to stay tucked under. I free hand it with a dremel and abrasive wheel. But then I've I done a few. It's all about geometry. I also put in a longer box.
    Yeahh, I'm hip to milling the Wyatt's boxes and since I have a dozen actions of all sorts variously kicking about I'll just copy acros't if I have to do the angles. And since I'm gonna' first try a centerfeed HS detachable box, I'll try get by with just the feedramp....

  8. #8
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    Dec 2003
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    washington.........STATE that is.
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    Thank You guys for your feedback, I'll probably start gouging soon. I wanted to know it was possible....... cuz, well, I don' wanna' talk about it....call it PAST EXPERIENCE

  9. #9
    Join Date
    Feb 2003
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    CA
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    699
    Quote Originally Posted by alinwa View Post
    Yeahh, I'm hip to milling the Wyatt's boxes and since I have a dozen actions of all sorts variously kicking about I'll just copy acros't if I have to do the angles. And since I'm gonna' first try a centerfeed HS detachable box, I'll try get by with just the feedramp....
    Those HS center feeds are really nice! Work slick.

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