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.338 differences

 
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  #8  
Old 03-05-2011, 12:58 PM
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Re: .338 differences

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Originally Posted by Buano View Post
The previous posts covered the history well.

By far the most popular .338 is the .338 win mag, but that's likely mostly because it's been around a long time & it's powerful enough "to get the job done" in most hunting situations. The .340 Weatherby (which is a .338) added more powder to increase the speed of the .338 Win., and is widely considered the best elk round ever created.

The hotter .338 cartridges are more than most can shoot without a muzzle brake and are normally chambered in weapons weighing 12 pounds or more — often weighing much more.

The .338 Federal & .338 Ruger both came about recently to get a .338 into an action too short for a .338 Win mag.
Not quite. The 338 Win Mag is a 500 yard gun. Not useful in long range hunting. And the 340 Weatherby is hardly widely considered the best elk round ever created. And the Edge and RUM give up significant amounts of energy and velocity to the LM with 300 grain bullets. They are virtually identical with the 250 and below grainers.

Last edited by Lapua guy; 03-05-2011 at 01:01 PM.
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  #9  
Old 03-05-2011, 03:38 PM
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Join Date: Dec 2009
Location: NW MT
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Re: .338 differences

When I was growing up my father took me to our friends local elk camp.3-4 wall tents and such. No guns allowed inside,large wooden rack outside tent awning. It housed 7mm,30-06,308,308 norma,340 WM,8MMRM,300H&H,375, AND MY little ol 243.Could not wait to get a real elk gun some day.Most guys in the mountains had there 300,s and 338s.Ialways remebered these 2 cowboys hunting the high country with their 340WM, AND talk of shots at 700 yrds, this was all before a 338 lapua or laser existed.The local sporting shop always had a 340, and I longed for one. I have spent quite some time in the mountains now, many a elk I have seen fall, to the 338. Just a couple years ago a buddy and I shot are bulls, side by side , last day, over500 yrds. me325,him 338 win. The 340 got a 27 yr. jump on use over the lapua. The 340 as stated in my old Speer manual,is powerful enough for any Norh American game,less maybe the large brown bears. here is a little case size comp. may not be exact, but most close.h2o 340wm=93,8mmRM=99,338NM=107,300RUM=110,338EDGE=110 ?,338RUM=113,338LM=114,338-378=137
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  #10  
Old 03-05-2011, 04:03 PM
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Location: South of Canada and North of Wyoming
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Re: .338 differences

Quote:
Quote:
Originally Posted by Lapua guy View Post
Not quite. The 338 Win Mag is a 500 yard gun. Not useful in long range hunting. And the 340 Weatherby is hardly widely considered the best elk round ever created. And the Edge and RUM give up significant amounts of energy and velocity to the LM with 300 grain bullets. They are virtually identical with the 250 and below grainers.
I believe the poster meant the 338 WM was most popular in terms of sales, not LR capability.

I'm also curious why you wold say the EDGE is gives up signicant energy and velocity to the LM as they have almost idenical case capacities? The 338 RUM is a little behind then but not much, not what I would call significant... maybe 50-100fps.

No flame intended at all, just wondered why you would say that? I think the Lapua is a great cartridge and plan to get an Imp 338 LM before long.

-Mark
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  #11  
Old 03-05-2011, 04:23 PM
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Re: .338 differences

Quote:
Originally Posted by MontanaRifleman View Post
I believe the poster meant the 338 WM was most popular in terms of sales, not LR capability.

I'm also curious why you wold say the EDGE is gives up signicant energy and velocity to the LM as they have almost idenical case capacities? The 338 RUM is a little behind then but not much, not what I would call significant... maybe 50-100fps.

No flame intended at all, just wondered why you would say that? I think the Lapua is a great cartridge and plan to get an Imp 338 LM before long.

-Mark
Brass Quality gives you an advantage more versus the edge, and case capacity isn't totally the same. I would say that 100 FPS with a 300 grainer equates to about 50-100 yards of additional range depending on BC. Probably 50 ft-lbs more of energy too.

They are close though. You are correct. Kind of why they call the Edge a poor man's Lapua.
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  #12  
Old 03-05-2011, 07:55 PM
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Location: Wyoming
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Re: .338 differences

MontanaRifleman, I doubt there is a standard Lapua improved other than the standard Ackley shoulder and taper for all cartridges. In my opinion that is not the best Lapua improved. When I get all unpacked I can pull out the notes for you from back in the 90's of the ones we all found to be the best. I remember the best one I settled on pushed the shoulder forward and changed the angle to I think 35 degrees with minimum body taper. I don't remember the exact specifics that far back but can find all the specs in my notes which are packed away.

Guys, from all the tests on my 1000 yard range which included numerous rifles in 338 RUM, 338-300 RUM and 338 Laupua, there is just not enough seperation between these three to make a call either is faster. Accuracy loads in all three with 300 grain bullets hit between 2750-2850 fps in probably 90% of all rifles. Either could outshoot the other just depends on the barrel. If you flat out push them the Lapua can be pushed slightly faster. You have to go to the Lapua Improved to begin to get any real seperation from these three. That will give you 100+ fps. I have shot dozens of all these rifles for thousands of rounds. That is what I found.
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  #13  
Old 03-05-2011, 09:16 PM
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Re: .338 differences

Quote:
Originally Posted by Long Time Long Ranger View Post
MontanaRifleman, I doubt there is a standard Lapua improved other than the standard Ackley shoulder and taper for all cartridges. In my opinion that is not the best Lapua improved. When I get all unpacked I can pull out the notes for you from back in the 90's of the ones we all found to be the best. I remember the best one I settled on pushed the shoulder forward and changed the angle to I think 35 degrees with minimum body taper. I don't remember the exact specifics that far back but can find all the specs in my notes which are packed away.

Guys, from all the tests on my 1000 yard range which included numerous rifles in 338 RUM, 338-300 RUM and 338 Laupua, there is just not enough seperation between these three to make a call either is faster. Accuracy loads in all three with 300 grain bullets hit between 2750-2850 fps in probably 90% of all rifles. Either could outshoot the other just depends on the barrel. If you flat out push them the Lapua can be pushed slightly faster. You have to go to the Lapua Improved to begin to get any real seperation from these three. That will give you 100+ fps. I have shot dozens of all these rifles for thousands of rounds. That is what I found.
That is all probably fair to say. And yes, the only LM Improved I know of is the standard 40 degree Ackley fireformed shoulder
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  #14  
Old 03-05-2011, 10:16 PM
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Join Date: Jun 2006
Location: Iowa
Posts: 42
Re: .338 differences

If the 338 RUM is so popular now, why does Remington only list one rifle chambered for it?

I'm looking to get a 338 and probably will go with a factory sendero in 300 RUM and eventually re-barrel it to a 338 RUM or Edge. Probably a little cheaper than going full custom.
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