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338 rum rifle build?

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Unread 07-20-2008, 06:48 PM
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Join Date: Jul 2004
Location: Texas
Posts: 7,230

The edge is a good choice and very easy to resize (Expand the neck to .338)

I think I would use the 375 RUM brass so I could turn the neck down after
sizing and end up with a thick neckwall.

When you size/expand a .308 neck to .338 you get some neck thinning and when
you down size a .375 to .338 you will get some thickening and this is good to
a point and when you turn the OD of a neck the main advantage is truing the
neck to the body of the case

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Unread 07-20-2008, 06:53 PM
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Join Date: Mar 2008
Posts: 603
I have been saving for this rifle for quite some time now and the all the while have been convinced the edge was the rifle I would build. I finally have the money saved but now I cant decide between the edge or the ultra. There is no difference in the price of the build so the only real difference is the cost of the dies, which appears to be about 100 dollars. Does this sound correct, or am i missing anything? The only pro for the ulra is that it would cost 100 less (dies) and that factory brass is available. I really appreciate all the input from you guys and so far I am gathering that there is not much difference between the two. I am ready to go on this thing, can anyone sale me on the idea of one over the other?

Thanks again for your help.
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Unread 07-20-2008, 07:15 PM
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Join Date: Jan 2005
Location: Western MI
Posts: 718
The decision would depend on what your intentions are. If you are going to shoot the 300 gr bullets, the extra 100-125 fps advantage is with the 338 Edge. If you are going to shoot 200-250 gr bullets, not too much of an advantage and the 338 RUM would work very nicely.
You could also consider the 338 RUM AI. Pretty much 338 Edge performance yet you can still shoot 338 RUM factory ammo.

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Unread 07-20-2008, 09:45 PM
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Join Date: Jul 2007
Location: Arkansas (Home of Record)
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I use .338RUM dies for my EDGE, so you don't really have to consider the extra cost of 338-300 dies. Very easy to load for. I got the EDGE because I wanted to shoot the 300SMK and wanted the little extra horse power to push them. I'm getting a little over 2800 with GREAT accuracy.
You will not be disappointed either way.
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Unread 07-20-2008, 10:00 PM
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Join Date: Mar 2008
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what is a 338 RUM AI? what is the difference between it and the 338 RUM? Also in considering my choices, where does the Lapua fit in? would there be any extra costs involved with it?
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Unread 07-21-2008, 05:35 AM
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Join Date: May 2007
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I would agree that if you had the 300 smk as your choice pill then I would go the edge.

For me personally I would want the extra speed with the big pill. But then some would say you can only kill'em dead !

Very straight forward to load for and extremely accurate. My gun makes cold bore first round hits on tennis balls at around 800 yards in good conds. What more could a man ask for ?

Currently I dont know of anyone else in Australia using one and it has certainly made believers out of a few guys down here ! So much so that DE has another 3-4 getting ready to go to the land DOWN UNDER !

I have not read of anyone unhappy with the calibre. Have you ??

Good luck my friend

With each step in the bush, you are a step closer.
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Unread 07-21-2008, 02:48 PM
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Join Date: Mar 2002
Location: Wyoming
Posts: 2,612
If you are worried about a few dollars for dies , brass or bullets I don't think you are ready for the expense of a custom rifle yet. From your questions I really think you need to do a lot more research as to what is out there before you make a bunch of dollars mistake. If a few dollars for a die or brass concerns you then you do not need to make a custom rifle mistake.

I have tons of rifles in all kinds of wildcat calibers so I don't have to be picky with what I build. But if I saved for one rifle I would know all the answers before I spent my money. First is what I planned to do with it. First is hunting or targets. If I had to do one long range hunter it would be off the 378 wby, big rigby case or similar. 416 rigby brass is cheaper than ultramag if that concerns you. The first time you sit next to me or someone with one of these and you see the difference between 300 fps you are going to want to sell your ultra and get one. Pure and simple. If you are building a target rifle I would go with the 338-300 ultramag. It is cheaper to shoot a bunch at the range all the time and velocity is not as important as how good you can shoot it.

I have at least ten 338's off the 378 or 416 rigby and there is no comparison to the 338-300 ultramag of which I have I think three remaining now. Some I have set up to shoot the 200 grain ballistic tip for hunting out to about 700 yards. Beyond that I have others set up to shoot the 300 matchking at extreme ranges. The 200 ballistic tip at 3500-3700 fps is incredible on elk size critters which is where my guns shoot this bullet. It falls flat beyond 700 yards though and that is 300 matchking country. The 338-300 ultramag will not begin to approach these velocities or do what the big boys will. That means a lot in hunting.
Predictions are difficult, especially when they involve the future
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