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Can a 338 lapua mag

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Unread 06-16-2009, 06:04 PM
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Re: Can a 338 lapua mag

It is possible but as mentioned, it would likely be wiser to just go with the 338 Edge which is basically identical in performance to the Lapua but would work in the bolt face with no modifications needed there.

The Vanguard is a strong receiver and could likely handle anything that the Rem 700 could but it is not nearly as easy to convert as the Rem 700.
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Unread 06-16-2009, 06:28 PM
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Re: Can a 338 lapua mag

Originally Posted by 358sta View Post
J E Custom - Are your decimals in the wrong place - .0845" vs 0.845"? I figure they are. Just wanted confirmation.
Yes they are. sorry I should have proofed it before I posted.

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Unread 06-17-2009, 10:35 PM
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Re: Can a 338 lapua mag

I wouldn't do the lapua on the vanguard/howa action. I have done easily over fifty ultramags, probably over fifty 338-300 ultramags off this action. It is a very strong action for the ultramag but requires more work for proper feeding than the 700 action.
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Unread 06-19-2009, 09:05 AM
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Re: Can a 338 lapua mag

Thanks J E Custom. I have looked at a few but never had the chance to work on or inspect one.
Interesting lug contact area. With 3 lugs in one diamter and a few thou clearance, each lug is what, .44" long ? and .062" into the action [clearances reduce the actual contact area]. This would give .240" total lug contact area, that's a LOT of contact area, well over 2.5X that of a Rem. I'm not going to run out and buy one or anything but its interesting nontheless.


Originally Posted by J E Custom View Post

I don't have them all but I will give you the dimensions I have.

Weatherby MK5 bolt dimensions =

Bolt body = 0.845 outside diameter.
Lug O.D. = 0.845 with 9 lugs.
Bolt face O.D. = 0.716 avg.
Bolt face I.D. = 0.537 standard magnum.
Bolt face I.D. = 0.585 378 based cases.
Magazine length = 3.800"

As you can see with a bolt face outside diameter. of .0716, you can open it to .0585 or even
.0610 with out removing the shroud.

I hope this helps

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