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Turn a 7mm Wby Mag Mk V into a .404?

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04 July 2011, 01:02
McStern
Turn a 7mm Wby Mag Mk V into a .404?
Hi Guys,

I seem to miss the relevant information:
Would it be possible to re-barrel my MkV (it's 7mm Wby. mag) with a .404 Jeff. barrel?

Would the system length be adequate?

thanks for your help

M.
04 July 2011, 17:52
jeffeosso
perhaps the bolt wouldnt travel enough? a 416 ruger would.


opinions vary band of bubbas and STC hunting Club

Information on Ammoguide about
the416AR, 458AR, 470AR, 500AR
What is an AR round? Case Drawings 416-458-470AR and 500AR.
476AR,
http://www.weaponsmith.com
05 July 2011, 08:00
theback40
Should be long enough, as it's the same action they put the 378 and 460 in. I cant remember, is the magbox a straight line feed? or is that only the 378/460?
05 July 2011, 11:18
Hog Killer
[QUOTE]Originally posted by theback40:
...is the magbox a straight line feed? {/QUOTE]

No
05 July 2011, 19:17
McStern
Many thanks

McStern
07 July 2011, 04:16
PoppaW
I have thought this and put 3 404's into my 7mm mag to see. Looks like it would work great. Some 7mm's have a mag filler to shorten the mag, mine doesn't. If you have this you will need to remove it and then lengthen the bolt stop groove in the bottom of the action. As always it may need feeding worked on.
I tried the 460 mag also and the 404 is real skinny in that one. Could be modded to work.


WOODY
Everyone is allowed an opinion, even if its wrong.
08 July 2011, 04:36
Atkinson
It will work just fine..Most all need some tweeking and your will need magazine work etc. That's a big ole action and takes the 416 Rigby and 416 WBY, both larger cases than the 404 Jefferys.


Ray Atkinson
Atkinson Hunting Adventures
10 Ward Lane,
Filer, Idaho, 83328
208-731-4120

rayatkinsonhunting@gmail.com