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Which .338 should I have built?

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Unread 09-29-2005, 06:31 PM
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Join Date: Sep 2005
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Re: Which .338 should I have built?

I am getting the parts togethor and am building a 338-300AI the only reason for an AI is i have a reamer available i think you would be best to go with a 338 Edge. On the brass issue i have run the 375RUM cases over a Junke machine and they were verry consistant as good as Lapua so i dont see a problem. I will be just necking down 375RUM brass in one pass through a 338RUM die and they form perfectly and you have less work hardening than necking up 300RUM cases. Hope it helps.

Cheers Bill
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Unread 09-29-2005, 06:47 PM
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Join Date: Jul 2005
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Re: Which .338 should I have built?

Iv2hunt, I would go with Remington action and the 338 Lupa Magnum. The A-5 stock is a great choice, you will love it if you go that rout. If you can, go with a 338 Lupa Magnum Improved. Good luck with your project!
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Unread 09-29-2005, 10:18 PM
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Join Date: Sep 2005
Location: Southern California
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Re: Which .338 should I have built?

Thanks guys, I will be going to a gunshow this weekend to search for a remington 700 donor rifle or action for this project. I am assuming any long action will work? Is there a certain "better" 700 action that I should be on the look out for, or are they all pretty much the same.

Thank you,
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Unread 09-30-2005, 05:09 AM
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Re: Which .338 should I have built?

Idealy you should find a RUM action... less work for the smith I believe.

I'd do the 338 Lapua... very good brass.. no fire forming.
Brass is expensive yes... but will last a long time.

call Chris and see what he thinks ... he's done a bunch of LM's on remmy's...
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Unread 09-30-2005, 08:24 AM
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Re: Which .338 should I have built?


I have been watching this thread for awhile and have not made any recommendations simply because it was going basically the same direction I would recommend.

I do want to however talk about the 338 Edge a bit even though I am positive Shawn gave you the complete low down on his round.

Basically it is getting a pretty hard rap on this post. Well, better said, the 338 Lapua is getting made out to be a VASTLY superior design for several reasons and I do not nessesarily agree with all of them.

It has been said that the 338 Lapua case is vastly stronger then the RUM. That may be true as far as looking at the case itself is concerned but the strength of a case is overwhelmingly dependent on the dimensions of the chamber. If you have a loose chamber and you load the 338 Lapua hot you will loosen primer pockets just as fast as the RUM brass.

Conversely, if you have a very quality tight speced chamber for either the Lapua or the Edge, you will be able to hit 65,000-68,000 psi with no problem at all and long case life with both rounds.

So for case live, its more dependant on chamber then brass used in the final result.

As far as brass quality, yes I will give the Lapua its fair comings and say that for out of the box brass, the Lapua hulls are superior. That said, with a little bench time you can turn the Rem RUM cases into extremely consistant lots of brass that will run toe to toe with the Lapua cases. Just more time involved.

It has been said that another advantage of the 338 Lapua is the fact that there is no fireforming needed compared to the 338 Edge. If I am not mistaken, the 338 Edge is the 338-300 RUM with a name change for safety issues. There is no more fireforming needed with this round then there is with Lapua rounds.

The 338 Edge can be cold formed. Which means you run a 300 RUM case throught the 338 Edge Full Length die which I would assume Shawn recommend the Redding with its tapered expander which makes this neck up process so easy its hard to believe its actually necking the neck up. And your done. Trim to length and your ready to roll with full tilt loads from the start, no major case transformation needed.

I am also pretty sure the dies would be pretty easy to get through Shawn for the 338 Edge. As a side note, I have actually used the 338 RUM dies to load for the 338-300 RUM with great results but I would recommend getting 338 Edge dies from Shawn if you have a rifle built.

With both rounds to get top accuracy you will fireform the case and then go from there. I do not know to many extreme range shooters that when the time comes for serious shooting use virgin cases????? May just be me.

There is no advantage with either design as far as ballisstic performance goes, they are ballistic twins. If you use the Lapua Imp you get a bit more but not much.

This post was not to promote or detract from either round. Only to state that some of the reasons for using the Lapua over the Edge are not as significant as many would lead you to believe.

The end result, hitting the target at whatever range you choose has much more to do with the rifle then what round you are putting in the magazine box to be honest.

Another thing to remember comparing the 338 Lapua to the 338 Edge. IF you want a repeating rifle, the Lapua based on the Rem 700 will require an H-S Precision Detachable magazine system which will add from $220 to $250 to the finished rifle price compared to the Edge which can use the factory RUM mag box and BDL floorplate.

For extreme accuracy I actually prefer to use the RUM mag box in an ADL stock with this level of recoil it greatly stiffens the stock.

Either way you look at it both are great rounds. The 338 Lapua is the established round but it will depend on the rifle as to which would actually perform better. I know from the rifles I have built in both chamberings (338-300 RUM) They have both been very impressive.

Just my two cents worth.

Kirby Allen(50)
Kirby Allen(50)

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Home of the Allen Magnum, Allen Xpress and Allen Tactical Wildcats and the Painkiller Muzzle brakes.

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Unread 09-30-2005, 11:40 AM
Join Date: Jun 2007
Location: North Idaho
Posts: 1,877
Re: Which .338 should I have built?


Kirby is 100% on with his info on the EDGE. If brass quality is an issue the Federal brass is very good. I also agree that the rifle will make or break the day not so much the round it is chambered in. I have built several Lapua mags on 700's also. The EDGE holds 1 more round and is a fair amount cheaper to work with both in building the rifle and reloading. I can not tell a lick worth of difference between the rounds for accuracy and in terms of capacity the edge has just slightly more case capacity. I have noticed with similar barrels, length bullet etc that the EDGE will have 30-60 fps on the Lapua, but I say even at that they are practical equils. I believe there is no bad choise for you to make. They are simply 2 good rounds to choose from.
Shawn Carlock
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Unread 09-30-2005, 11:48 AM
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Re: Which .338 should I have built?

Actually I have been thinking on this as well.

Kirby know his stuff obviously and knows quite a little more than I do.

However, I was informed that a good action to use would be an LA on a 30-06 caliber Bolt face for example.

What else has me thinking is this... and I'll just be blunt and honest...

You seen relatively new to this game and I am not sure how much experience you have with LR shooting, reloading etc. I know you mentioned that you ahve a budget... my personal opinion is a 338 anything isn't really a budget rifle .. if you neck up anything you run into the probobilitycase necks splitting etc. etc. the Lapua Brass itself will cost over $100 for 100 pieces. they both burn large amounts of powder and they both kill on one end and wound on the other... if ya know what I mean. The stock and barrel will run you around $900-$1000 right from the top.

1000 yard and beyond hunting is easily accomplished with many 30 cal rifles out there.

a 300WM and a 300RUM can be made to suit your needs quite easily if you run 220's or 240 gr bullets you should be fine...
There are also alot of 7mm's out there that can handle the job as well.

I am shooting a 300WM and running 200 gr accubonds at 2930 fps and have more than enough for 1K hunting. I have a 7mmWSM that I wouldn't hessitate to take a deer at 1000 yards with if the opportunity presented itself...

I'm not really trying to talk you out of it just trying to get you to realize that the 338 isn't necessarily the best caliber to get your feet wet with in 1000 yards shooting/hunting.
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