All,
Still fidling around with the 8mm idea as I have a barrel ready to go. My action is a bit too short for a simple 8mm Rem Mag. I have asked some of you personaly and have loved the feedback. What velocity should I be able to get out of a 200 - 225 grain bullet out of a 8mm - 338 Win Mag? Would there be a better case to base the round on that would be easy to get my hands on. I would like to explore a non belted case if there is one that would work without a lot of fireforming or brass work. I like the idea of necking down a 338 Win Mag case and that be the only thing neccessary to get me going.

The rifle itself is a Win Model 70 in 300 Win Mag. or a Model 700 Sendero in 300 Win Mag. I will build it on either. I want to alter either as little as possible. I also want to get as close to 8mm Rem Mag velocities as possible. If an 8mm Rem Mag would work I would simply go that route but it sounds like it would be $ prohibitive with the mods that the smith would have to do. Whatever your suggestions I would love to hear them and what velocity you can get. To those of you who have replied to me personally, thanks very much.

I would just love an 8mm Mag that delivers the goods fast and flat and from a package that will fit into one of my rifles in the most economical way. Thanks

Cheers,
Jason

I am currently working on a similar project, I am using the 300 win mag case as it has a touch more powder capacity, and i think that with good handloads 3000fps with 200gr MK's would be entirely possible.

Rock

I have often thought of necking up the 8x68 to .338. This is a nonbelted case w/ a bit more capacity than the .338WM. Factor ammo & cases area available. Just curious, why not just go to one of the .338 or .338 wildcats?

That exact cartridge (8mm/.338) is listed in Speer Loading Manual #9 on pages 299-300. They say you can get about 2500 fps with the 225 gr. bullet. This is with a 23" barrel.

[ 05-27-2003, 09:34: Message edited by: WyoJoe ]

Jason,
I have worked with a cartridge which is almost identical in capacity to the 8mm-338WM.
I named it 8mm MAZON.
It is based on the 9,3x64Brenneke case necked down to 8mm or .323" with no further alteration.
1st quality brass is available from RWS, even though I ordered correctly headstamped brass from Dieter Horneber in Germany.
Being 2.52" long it easily accomodates on standard length actions.
Thanks to the kindness of H. Lutz M�ller I was able to publish some information in his web site, information that you may find in http://home.snafu.de/l.moeller/8-9,3x64S-Brenneke-Mazon.htm
Should it be of any furthrt interest to you, do not hesitate to ask for any additional information.
Regards,
Montero

jrswick@yahoo.com
I just came across the 8 x 338 thread. I have a converted '98 Mauser that I spent considerable time on a few years back. I was extremely happy with the velocity but the rifle has a bedding problem that I haven't had time to correct (it strings impact points as the barrel heats up). I will try to find my notes on pet loads for it. What have you done with your project?

I have done considerable experimentatin with the 8mmx338, and it is a fine caliber.

Quite similar to the 338 Win Mag, and maybe not worth the trouble in the end.

I got 200 gr Speers at 2953, and 220 Hornadys at 2787, and 220 sierra BT at 2846

If anyone would like my files, I can fax them to you, just send me your number.

it's the 8PPM.. poor man's magnum.. supposed to be a chamber, bolt face, and feeding away from a stock m98 to a mag.
jeffe

I have designed and built an 8m/m x.425WR nx 2.5" that is now an 8m/m x404 x2.5". I would let you use the reamer but when I switched to the .404 case and the Ultra mag. cases I had to lapp out the chamber slightly. When going to these cases and using something like a mod.98 unless you build a single shot there is a little magazine and rail work to do to make it feed. Just necking down the .338 doesn't sound all bad. I hear some folks have been using belted Magnums for some time now without much tado. If you contemplate a 8m/m x 57 conversion it may be hohum but the
8m/m-06 has everything a mere mortal hunter could put to use. If you desire to play with something different hot and trendy we ( most all)of us understand that. Have fun.Roger

OK.
The 8mm Rem has a distance of .75" from case mouth to max COL. (2.85" + .75" = 3.6").
Add .75" to 2.5" and you get 3.25" - easy to feed in a Mauser, right?
Now, if you make a case that looks like the 8mm Rem from the shoulder up, but on a 2.5" Jeffery case, according to RCBS.load the case ends up with about 1 grain MORE water capacity than the Remington!
Go for it! Throw in the theoretical efficiency benefits, and you may just top the Remington with same bullets, same barrel.
Rmember, John Ricks will split the cost of a wildcat reamer with you, if you let him keep it.

How about the non-belted .376 steyr case, it might give you close to what you want being a shortened 9.3x64 case by 4mm. Hornady is supposed to have the cases available. They say the shoulder angle is 15 degrees but I have seen a case diagram supposedly provided by Hornady(who makes the ammo) and it shows a 17.5 degree shoulder.

Hey jrswick,

Have you considered the 300 WSM case. All that would be necessary would be to run a case over an expander die and you're ready to load. The cases are commercially available and relatively inexpensive. With the right powder you could get real close to the 8mm/338 ballistics.

I just had an 8mm/06 made and man is it fun!

I hope you're enjoying your search.

Good shooting,

Smoker*

8mm/.338 is the 8mm "Poor Man's Magnum". It has been around for ages, and there's even some data in one of Ackley's books, I believe. Will at least duplicate, if not beat, the performance of both the .300 Win. Mag., and the .308 Norma!

[QUOTE]Originally posted by eldeguello:
[QB]"8mm/.338 is the 8mm "Poor Man's Magnum"."
The first time I saw the term "poor man's magnum" used was in the American Rifleman about circa 1950 and it was in an article dedicated to the 8m/m-06 wildcat.I have seen it used since for a number of other cartridges. No arguement just info. roger

If you want the poop without the bolt alteration then think about the 8mm Gibbs. It comes in right on the heels of a 8mm/338 from a fireformed 30-06 case. Case forming would be like making 9.3X62 cases from a whelen case.