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edge vs ultramag is there any difference

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Unread 09-12-2010, 01:06 PM
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Re: edge vs ultramag is there any difference

They are the exact same thing performance wise in a hunting situation and either will do anything the other will do. That is why me and most others dropped the 338-300 ultramag when the 338 ultramag was introduced in 2001. When I developed the 338-300 ultramag in 1998 it was the best thing going for a guy to get into serious long range shooting at big game animals. Anyone who had a standard magnum action could easily and inexpensibly rebarrel to the 338-300 ultra and with a little action work be sheer terror on long range animals. Back in the 90's I probably did a hundred of them for long range elk hunters. It would not compete with the 338-378 wby wildcat but there wasn't enough difference to be worth the expense of doing the wby wildcat since you needed a mk 5 action or a custom.

Then in 2001 Remington introduced the 338 ultramag which did the exact same thing with over the counter products and fed much better through standard mag actions with long bullets. The 338 ultramag is the better round because of the advantages it offers. I tested both extensively during that time period and have shot the 338 ultramag over my two 338-300 ultramags I have had since 1998. Stick with your 338 ultramag.
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Unread 09-12-2010, 02:29 PM
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Re: edge vs ultramag is there any difference

The 100 or so FPS advantage to the 338 Edge over the 338 RUM with 300 grain SMK is something to consider
range it,check the wind, dial in correction, aim and only one shot
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Unread 09-16-2010, 01:59 PM
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Re: edge vs ultramag is there any difference

I was weighing the same decision about a year ago (338 RUM vs 338 EDGE). When I really sat down and looked at the arguments some make against the Edge, only one really made sense... factory ammunition available. For me, this didn't matter, and I would never use factory ammo in this role anyhow. I'm having a 338 built for long range shooting, which requires precise and consistent ammo, knowledge of exact velocity, etc. I am never going to walk into Jimbo's Corner Market near my hunting grounds and need ammo. Load your own, load it well, and go prepared... my 2 cents.

Some other arguments against Edge:

- In order to fit mag length with 300 SMKs, you lose the extra capacity advantage, so you might as well go 338 RUM anyway.

--- Get a Seekins DBM, or Wyatt's extended box mag, problem solved. Seekins offers 3.94" COAL, Wyatt's offers 3.82" COAL. Some minor gunsmithing of the action required (cost me $75 to have installed from my smith, big deal).

- There's extra work required to form the brass.

--- BS. Every bag of Remington brass I get has dinged necks and needs to be run through a sizing die anyway before loading. It takes no extra effort to put in the tapered expander ball and size the necks up to 338 during this step. THERE IS NO FIREFORMING. Run it through the die with expander ball one time, and then it's done for the life of that case.

- The RUM will do everything the EDGE will do.

--- Sure it will... 100 FPS slower. Slower is slower is slower, Period. 100 FPS more (general consensus) is an advantage. However small I'll take it. To argue that is kind of silly to me. Following that line of logic, you could talk yourself right into a 338 Federal. I don't contend my Edge will be able to do everything a Lapua Improved will do. It won't. It's slower. At some point that comes into play. Edge, FOR ME, was the best compromise of cost / barrel life / velocity / energy / etc.

It also does seem to me that 338 RUM is slowly being scaled back by Remington. If you look at their product line, not much available in it anymore. Whether brass availability could be an issue in the future... who knows. But it doesn't hurt to be on the right side of that issue if it ever does come up.

I would recommend 338 RUM for anyone who wanted to buy a factory rifle and not reload. For anyone else, the Edge has the edge ;-) . ***EDIT*** In that case though, I would probably recommend a R700 MLR in 338 Lapua... so I guess I would never recommend the 338 RUM.

Last edited by AJBello; 09-16-2010 at 02:04 PM. Reason: Afterthought.
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Unread 09-16-2010, 02:53 PM
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Re: edge vs ultramag is there any difference

I have no experience with the 338RUM but I do have a 338 Edge built on a M700 action. It is by far the easiest cartridge to reload for I have ever been around. At least this particular rifle is not sensitive about bullet run-out (within reason), powder charge or OAL. The combination just flat shoots well. I have heard similar stories from other Edge owners.
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Unread 09-16-2010, 03:52 PM
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Re: edge vs ultramag is there any difference

Good info along the same lines shot today: 338 rum and edge-have ???'s
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Unread 09-16-2010, 09:49 PM
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Re: edge vs ultramag is there any difference

I rebarreled my 338 Ultra mag to Ultra mag again. I had dies and brass already and didn't want to do the extra brass work.
Plus out to 1000 yds 100 fps isn't going to make that much difference.
I'm not planning on shooting 300 grainers either. I'm working with the 225 Barnes TTSX's.
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Unread 09-16-2010, 10:23 PM
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Re: edge vs ultramag is there any difference

Back when the 338 RUM came out in 2001 I shot it quite a bit head to head at my range with the 338-300 ultramag I developed in 1998. The velocity difference depends on the individual barrels. Some 338 RUM's shoot faster than some 338-300 ultramags and the reverse. I think this ficticious 100 fps thing came from most 338-300 ultras were done with 30"+ target barrels and most guys shooting the 338 RUM had off the shelf 26" barrels. Head to head, apples to apples, same length barrels there is no 100 fps difference. It just depends on the individual rifle. I get tired of these internet junkies that keep reading internet BS and repeating it making people think this miraculous edge they now call it ( been called by many names since 1998) is some kind of miracle cartridge.

It is an excellent cartridge. I knew it would be as soon as I got my hands on the 300 RUM specs in 1998 and immediately knew the best version of this would be 338 and worked to design a reamer and throat dimensions for it. I had realized for many years the 338 with the heavy, high BC bullets was the best for long range elk and was at the time working with several top gunsmiths around the country to come up with the best improved lapua design. The Lapua and Ultramag cases were a blessing to the 338 long range shooters coming up through the 70's and 80's blowing out the 378 wby and 416 rigby cases to get extreme velocity 338's. The Lapua and ultramag will not match those velocities but with the ultramag case here was a cartridge that could be easily rebarreled on a standard magnum action and for little expense put a guy into a very good long range 338. Also no more expensive lapua and wby brass. Here was the ultimate for a working mans 338 and that is why I jumped on it hard in 1998 and pumped it all over the country. By the turn of the century I had several top gunsmiths who were working on the improved Lapua now going like gangbusters on the 338-300 ultramag because they didn't need an action required for the lapua or 378 wby case. Anybody with a standard magnum action and a little action work and they were good to go. This was the beauty of the cartridge.

But it is what it is and no more. There are no golden bullets with it. It is a good 338 for the price but will not compete with the big custom rifles off the improved 378 or 416 rigby cases. It was not developed for that but the hype unfortunately got beyond the capabilities. Again it is no better than the 338RUM. I have built and shot enough of both to know. I have hunted all over North America for many years. During those years I was glad on several occasions I was shooting a rifle I could buy a box of bullets for. It flat out saved some high dollar hunts for me when my custom loaded bullets didn't show with my bags. The 338 RUM will do anything the 338-300 ultramag will do and do it with over the counter ammo and products. Also it feeds way better through standard magnum actions with long heavy bullets. Not nearly as much action modification is needed. The 338-300 ultramag just didn't make sense after 2001. If a guy paid custom money he wanted the top performer on a hunting weight rifle like the improved 378, 416 or lapua. In the ultramag case the 338RUM was a better fit leaving no need for the 338-300. So in 2001 the 338-300 ultramag just fell into no mans land for most of the gunsmiths of the time.

I have or have shot about every wildcat anything out there and enjoy them all. I don't care what a guy shoots. But I want a new guy who doesn't have my experience to make his choices from clear and accurate information and not hype on the internet.

Most guys never will shoot beyond a half mile in a hunting situation and the 338 winchester may actually be the best choice for anyone who does not shoot beyond a half mile. Lightweight, no muzzle brake, extremely accurate. If a guy shoots beyond a half mile the really big 338's are best. So where does that leave the ultramags anyway. Just food for thought from a guy who has hunted with them all.
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