7mm STW Model 70 to 404 Jeffrey?

25 May 2009, 04:50

Oregon45

I've got the foundation of a custom rifle sitting in the safe right now, waiting for me to make a final decision as to the caliber, here's what I've got:

Winchester Model 70 classic, 7mm STW
McMillan Echols Legend stock, magnum fill, #4 Shilen barrel channel.
Williams 1pc Obendorf bottom metal

I was planning on building a .375 H&H, but the more time I put in with my 450/400 Ruger No. 1, the more I'm thinking a bolt action twin would be nice to have.

So, is it feasible to do a 404 Jeffrey build on a 7mm STW action? I've read most of the threads discussing Model 70 conversions and they were done mostly on 300 RUMs, which, I gather, have a different magazine box and follower. What parts would I need to find before sending everything off to the gunsmith?

I intend to use Hornady brass, bullets and dies; are the Clymer and PTG reamers the proper specs to use that brass?

25 May 2009, 04:58

MARK H. YOUNG

I just spoke to Lon Paul who builds safari rifles for a living about a 404. Your Model 70 would work nicely. You might have a $1,000 in it before you finished. The Mod 70 and the Echol's stock will make a great rifle.

Mark

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25 May 2009, 05:00

Oregon45

I'm accumulating the parts slowly to spread out the cost

The last part I will buy is the barrel as then the caliber choice becomes terribly, terribly final.

25 May 2009, 05:33

Dr. Lou

quote:
Originally posted by Oregon45:
I'm accumulating the parts slowly to spread out the cost The last part I will buy is the barrel as then the caliber choice becomes terribly, terribly final.

Nothing's final. You just buy another barrel.

25 May 2009, 06:38

McCray

Winchester still has the mag box and follower for RUMs...or did a few weeks ago. But with the 404, mine fed best with a follower for a 375.

I don't think there is a lick of difference in the action itself. Probably need a little tweeking regardless.

25 May 2009, 06:47

N. Garrett

I owned a Model 70 Classic that I converted to 404 Jeffery.
It was originally a 7mm Remington Magnum.

All it required was a new barrel, some opening of the feed rails (very little), and the bolt face had to be opened slightly too.

I swapped out the bottom metal for one from Ted Blackburn, but that was for looks.

Fed cartridges like "buddah". One the smoothest rifles I ever owned.
One of the guys here on AR purchased it from me.

Good action for the 404 Jeffery.

Garrett

25 May 2009, 09:17

interested

quote:
Originally posted by Oregon45:
I've got the foundation of a custom rifle sitting in the safe right now, waiting for me to make a final decision as to the caliber, here's what I've got:

Winchester Model 70 classic, 7mm STW
McMillan Echols Legend stock, magnum fill, #4 Shilen barrel channel.
Williams 1pc Obendorf bottom metal

I was planning on building a .375 H&H, but the more time I put in with my 450/400 Ruger No. 1, the more I'm thinking a bolt action twin would be nice to have.

So, is it feasible to do a 404 Jeffrey build on a 7mm STW action? I've read most of the threads discussing Model 70 conversions and they were done mostly on 300 RUMs, which, I gather, have a different magazine box and follower. What parts would I need to find before sending everything off to the gunsmith?

I intend to use Hornady brass, bullets and dies; are the Clymer and PTG reamers the proper specs to use that brass?

My 404J is being done on s straight M70 7mm Rem. Very little smithing. Well under $1K

25 May 2009, 09:41

jeffeosso

458 lott

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

25 May 2009, 18:53

tiggertate

If you want a ballistic brother to the 450/400 and use the same bullets, try the 400 H&H.

26 May 2009, 07:49

Buliwyf

Yes, your .404 Jeffery project is feasible on your 7mm STW action, but, keep going up for the ultimate Big Bore, the .500 Jeffery.

27 May 2009, 02:47

mufasa

You could do a .375 with almost no work. If you want a .404, go to the AR classifieds and look for a 300 RUM. The rails and box are already set for a .404. I think it would be an eaiser conversion. MMP