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Which 338???Who to build it?.

 
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  #22  
Old 04-19-2012, 07:07 AM
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Re: Which 338???Who to build it?.

Forgive me if this sounds like a thread hijack but
I have to ask what about the 340 Weatherby? Is it capable of very good accuracy given it is put together by a reputable Benchrest gunsmith? The reason I ask is my action is now chambered in 8mm Rem Mag and would be an easy change to it. I do know it has a shorter throat than the standard 340 Weatherby reamer and is min neck but not tight neck
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  #23  
Old 04-19-2012, 10:33 AM
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Re: Which 338???Who to build it?.

The 340 wby is an excellent cartridge and the best we had for a standard magnum action until the 338 RUM came out in 2001. The 338 RUM will fit nicely on your action and would be the better choice because of cheaper brass, no belt and 125+ fps gain. I have shot the 340 wby since the 70's and like the cartridge. It is as accurate as any if built right. If wby can't bring their brass prices under control they are just loosing out to these new cartridges that perform as well or better with no belt and much cheaper brass.
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  #24  
Old 04-19-2012, 12:44 PM
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Re: Which 338???Who to build it?.

LTLR when you say The RUM will fit my action, I'm assuming you mean the length, but how does it feed or does it take extensive action work to make it feed thru the magazine. It is primarily a carry hunting rifle as the barrel is a #4 and can only be a max of 26"
What about the 338/375 Ruger is that going anywhere or is it a dead cartridge. The reason I ask is it measures the same as the WB belt at .532. My other thought is a bit shorter cartridge to be able to seat the bullets out farther which the RUM is a bit shorter.

Thanks
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  #25  
Old 04-19-2012, 02:46 PM
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Re: Which 338???Who to build it?.

There are several aftermarket magazines that fit your rifle and work well with the RUM. Modification is not difficult for your action to fit the RUM case. Bolt face and length are the same since you have the longest remington action with the 8mm rem mag. The rails will need to be slightly modified to feed properly with the fatter case. That is minor for a gunsmith. Accurizing your action is more work than changing it to the RUM. I shoot a 26" barrel 338 RUM regularly and it is one of the best carry rifles around. Mine weighs 8.5 pounds scoped out and I shoot a .64 BC 225 grain bullet over 3300 fps.

The 340 wby will work perfect. Just screw the 340 barrel in and it works perfect since the cases are virtually the same thing. You can neck up Remington 300 wby brass and save the wby brass cost since the 340 is just a necked up 300. I have both and on average there is about 125 fps difference between the 340 wby and the 338 RUM and 338-300 RUM that goes by several names.
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  #26  
Old 04-19-2012, 05:51 PM
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Re: Which 338???Who to build it?.

338/416 improved for a wildcat, or the 338 RUM for a standard cartidge. Build on a trued Remy with a good barrel smithed by this guy ----> Justin Sip Custom Guns, Inc.: Welcome , and all your dreams will come true!
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  #27  
Old 04-22-2012, 12:26 AM
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Re: Which 338???Who to build it?.

The 340 wby will work perfect. Just screw the 340 barrel in and it works perfect since the cases are virtually the same thing. You can neck up Remington 300 wby brass and save the wby brass cost since the 340 is just a necked up 300. I have both and on average there is about 125 fps difference between the 340 wby and the 338 RUM and 338-300 RUM that goes by several names.[/QUOTE]

So is the 338 rum faster than the 338 jarret? Will a 338 wim m70 be able to be reworked into a 338 rum?

And which bullet is a 225. Gr with a 640 bc? Thats amazing!
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  #28  
Old 04-23-2012, 01:11 AM
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Re: Which 338???Who to build it?.

The 338 Jarret I am familiar with is a necked up 8mm remington case which is the same thing as a 340 wby without the radius shoulder and freebore. The wby with the freebore is faster and the 338 RUM is 125 fps faster again on average. If that is the one you are calling the Jarret. The problem with all these names different shops gives cartridges they are hard to keep up with. I wish they would just all use the standard nomentclature of the base cartridge and neck size.

The 338 RUM can be made from a 338 win mag with modifications to make it feed properly. Some of the 338 win mag actions are the '06 length magnums and causes you not to be able to eject cartridges properly. I built several RUM's on 375 H&H model 70's but i thing they are slightly longer than the actions used for the win mags.

I am shooting the Cutting Edge 225 grain hunting bullet with the .64 bc between 3300 and 3350 fps out of my 26" barrel 338 RUM. On average I am getting 75-100 fps more velocity with the CE bullets than standard lead core bullets. That holds with this rifle as my previous load was a 225 Accubond at 3260 fps tops with the same load.
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