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338 Cal, What Chamber to use?

 
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  #1  
Old 11-27-2003, 10:53 AM
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Location: La Grange, TX
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338 Cal, What Chamber to use?

Hello to all:

I feel fortunate to find this board. I was referred off of one of our competitive shooting highpower boards.

A tiny bit of background. I've shot competitively for about 12 years in the service rifle class. I have a High Master ranking. I have hunted since I was old enough to hold a gun. I used to think 200 yards was a long way. Now with all my background 300-400 seems like a chip shot.

Heres my dilema. I have a couple of 300 wtby rifles. I want a bit larger bullet and after having shot a 338 win mag a bit and seeing how it performs with the superb 225 X bullet I want to build in that caliber. The one gun I have that needs a barrel anyway is a Wtby Fibermark in 300 wtby.

I"d prefer a non belted round. A 340 wtby would be easy but has the same belt. I"d prefer about the best MV I can get so I have room to manuever. I was hoping for ballistics along the line of the 338/378 round.

I will be shooting barnes X bullets and I load my own ammo(going through some 4000-8000 rounds of reloads a year depending on how many matches I can make)

Finally I managed to borrow a 338 this year while I was bowhunting in Alaska. We could not get close enough to any decent bulls for my recurve. But the 338 was fun and allowed me to make 2 hits at 802 yards to collect my 'bou. So I feel that the 338 diameter works really well.

The rifle will be for large and dangerous US game. I am working on a 7mm for a 1000 yard prone gun so I'll have a smaller mag for smaller game.

Awaiting your advice. PS wildcats don't bother me either. I want something that works and will fit my action.

Thanks in advance, and Happy Thanksgiving!

Jeff Rost
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Old 11-27-2003, 02:18 PM
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Location: Palmer, Alaska
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Re: 338 Cal, What Chamber to use?

Jeff,

I think you'd be happy using the 338 Lapua, or an improved version of it. You would be edging the 338/378 WBY pretty easily, especially with the lighter 225's. Lapua 338 brass is nice stuff, and it's built like a little brick **it house too. [img]images/icons/smile.gif[/img]

I'm building one this winter for the same reason. My brother has a Rem 700 in 338/378 WBY and its a nice round too. Much better brass with the 338 Lapua though.

A good friend of mine is going to be building a 338 Lapua IMP with my reamer at the same time.

I'm really impressed with the 30/338 Lapua IMP I had done this fall. [img]images/icons/cool.gif[/img]

Do a serch for "338 Yogi", it's an improved design of Dave Tooley's, and a few of the guys here use it too.

Brass costs more than the Ultra Mag does ($130 a hundred at Sinclair, or Brunos Shooter Supply) but it will last three times as long as the soft Remington hulls and is top quality stuff.

I can't wait to get started on mine.
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Old 11-27-2003, 04:13 PM
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Location: mi
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Re: 338 Cal, What Chamber to use?

I have been shooting a 338 yogi for about 1 year now I shoot the 300g SMK bullets. I have taken deer out to 1225 yards with this combo. I am putting a new barrel on it this winter and building a long range hand gun in this cartridge. I am getting 3050 fps with a 34" barrel 10T with the 300g bullets. The brass is excellent and I have 17 firings on 48 of them. I have been thinking about using the 408 CT brass and necking it down to 338 for a long range hunting rig also.
Crow Mag
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Old 11-27-2003, 06:30 PM
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Re: 338 Cal, What Chamber to use?

Will a 338 Yogi( or Lapua or Lapua Imp) work in my Wtby action for the 300 wtby? I dont' have any dimensional data for the round as of now.
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Old 11-27-2003, 08:15 PM
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Re: 338 Cal, What Chamber to use?

Brent

are you doing your own rebarreling or maybe using Craig Parker?

Thanks, Jeff
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  #6  
Old 11-28-2003, 12:33 AM
 
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Re: 338 Cal, What Chamber to use?

If you aren't wanting to modify your bolt I would go with the 338/300 Rem UltraMag. Just neck up the standard 300 RUM case or down the 375 RUM and you have alittle more capacity than the standard 338 RUM which uses a slightly shorter case. I think the Weatherby has a generous mag box so length shouldn't be a problem, you'd just have to work on it alittle to get it to feed properly. This is just my opinion and others may and will vary, good luck with your project.
Wayne
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  #7  
Old 11-28-2003, 01:36 AM
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Re: 338 Cal, What Chamber to use?

You would have to have the bolt opened up the 338 Lapua is the same size bolt as 338-378 WBY
Crow Mag
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