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7MM WSM - LA or SA with an extended mag box ...?

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Unread 03-24-2004, 07:42 PM
dwm dwm is offline
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Join Date: Feb 2003
Location: Texas
Posts: 737
Re: 7MM WSM - LA or SA with an extended mag box ...?

Brent, your right, I had the two mixed up. I fixed it.

7mm water capacity:
SAUM - 75 GR water
WSM - 83.2 GR water

7mm case length - neck length:
SAUM 1.724" base to bottom of neck
WSM 1.858" base to bottom of neck



The WSM's are longer than the RSAUM, and "Winchester's SA is actually a medium action, being in between the SA Remmy and the LA".

Thanks, I have been wanting to know this for quite some time. But are they long enough to seat bullets way long in a 7mm WSM case?

By the way, you don't have to buy a RUM action to feed the WSM. Any mag action will work with a few minor changes. I think they are cheaper than the RUM actions is why I mentioned this.

You mean like a 7mm Mag or 300 Win Mag REM 700 LA? What changes would have to be made?

I am now thinking buy a REM 700 BDL SS in 7MM/300 RUM, sell the barrel, toss the stock, add new stock, barrel and brake with 7MM WSM chamber. Ditch the J-Lock.

[ 03-24-2004: Message edited by: dwm ]
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Unread 03-30-2004, 08:37 PM
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Join Date: May 2001
Location: Urich, MO
Posts: 838
Re: 7MM WSM - LA or SA with an extended mag box ...?

Using a 7 or 300 Mag action, you would have to change the magazine and open up the feed lips on the action a tiny bit.
Chris Matthews
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