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Location: Wa.
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338-06

8mm mag moves a 180gr at 3000 fps with about 80grs of medium / slow burning powder but, can send one out the barrel at more than 3200 fps.
About 37% more powder than the 338-06 with the same weight bullet for the same velocity.

The 338-06 moves a 180gr at 2950 fps with about 58grs of medium burning powder. This is pretty much max.

The338 wm moves a 180gr at 3000 fps with about 70 grs of medium / slow burning powder but, can send one down the barrel at more than 3200 fps.
About 18% more powder than the 338-06 with the same weight bullet for the same velocity.

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Location: Missouri/Arkansas
Joined: 08/21/2003
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338-06

So it's more efficient.

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338-06

For all practical purposes. I would say the 338-06 is to the 338 wm, what the 280 rem is to the 7 rem mag.

The interesting thing about the 338-06. Bullets of the same weight in a 35 whelen, less bearing suface, don't attain a higher velocity.
Whereas, in the 280 rem, bullets of the same weight in a 30-06. Will attain a slightly higher velocity.
Of course, the smaller caliber in both cases has the higher SD and BC. Which makes the 338-06 a better performer than the 35 whelen.

An added note.
I've been looking at my findings and comparing the results. It's quite possible that, if there is a single all around cartridge. For all hunting in North America. The 338-06 could be it.

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Location: NONYA,thats in MONTANA
Joined: 07/22/2005
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338-06

I would never consider a cartridge that relys on custom built rifles and impossible to find ammo a canidate for "all around hunting choice".It is so obscure non of the big manufacturers will ever put it into production and I have never seen the ammo offered by any of the public sporting good stores,do you have to cut down another cartridge to make the brass or reduce the size of the neck?What did it cost you to have the barrel put on the rifle? Think

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338-06

A bit sceptical, aren't you. Thumbs up

Brass is available.
Most of the reloading manuals have a section on loads.
No, it isn't very popular or very well known but, neither were the 280 rem., 25-06, 35 whelen in their growth period.
There are only two rounds on that case size that have world wide popularity. The 30-06 and the 270 win. At one time the 30-06 was the only round made on that case size and that was after many years of development by the military.
The only other 33 cals offered, are in the large capacity powder burners with more recoil than most hunters can tolerate, with a minimal gain in trajectory over the 338-06. The 338-06 is capable of reaching out to the distances game is taken with enough delivered energy at those distances.

The whole project, including the rifle I started with, will cost a tad over $400.

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Location: Missouri/Arkansas
Joined: 08/21/2003
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338-06

If you use anything other than a 7mm Rem Mag, he will criticize.

Personally, I'd have just gone with the 338 Winchester Magnum. But if you have an interest in experimenting, then why the hell not try out the 338-06? Shoot some different bullets and loads in it, take it hunting and kill some game with it. Have fun with it. You know you can use it on all North American big game, with bullets in the 225-250 grain range.

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338-06

That's why the 338-06 is slow in gaining popularity. Most gun buyers would just as soon have a 338 wm and be done with it.
If a guy had an old or shot out 30-06 or 270win and wanted something with a larger diameter. A 338-06 would be a good way to go.

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Location: NONYA,thats in MONTANA
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338-06

is there a difference in the OS diameter of the barrel and if so do you have to rework the stock to fit the barrel? Think

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338-06

Very same contour.
A bit lighter in weight.