To .338.....seems ideal for a M-98 action...

Elk hunters dream?

What's the opinions?

Well a 57mm version would be good for the sacred Mauser and be a tad over 06 capacity. Could turn a 7x57 into a 280 Rem power. I agree a 338 and 6.5 version on an 06 size action would be pretty sweet with the long ogive bullets.

8x60 Steyr sounds pretty good to me.

In a 98 Mauser, it's probably 3 in the magazine, unless custom bottom metal was used.

A CZ 550 Medium action or a Ruger 77 MKII action, probably the magazine will hold four. The way to do that is get a donar action with a 30-06 bolt face, then order the magnum box and follower from CZ or Ruger. That would be less expensive than using the 98 Mauser action.

KB

quote:

8x60 Steyr sounds pretty good to me.

Ya got me here...is this a standard factory round?....albeit European?

Tell me more about it please!

I might be inclined to go the other direction and neck it up to accept .423 bullets.........

I thought a 404 version would be good. Kinda like a short 10.75x68
A .410" version will have the same capacity as the 405 Win.
405 win to 450/400 power

quote:

Originally posted by vapodog:

quote:

8x60 Steyr sounds pretty good to me.

Ya got me here...is this a standard factory round?....albeit European?

Tell me more about it please!

The 8x60S Mauser is not the same as the cartridge name I made up - the 8x60 Steyr.

The 8x60S Mauser is like the 30-06 case necked up to 8mm, and shortened by 3mm.

The wildcat 8x60 Steyr is like the 9.3x64 Brennekee case necked down to 8mm, and shortened by 4mm.

The cases have different head size, thus requiring different bolt face size.

The 8x60S will fit 30-06 magazines just like the 06, usually four down.

The 375 Steyr case or 9.3x64 case is fatter, and will stack only three in a standard 98 magazine. A true belted magnum magazine, which is in both the Ruger 77, and the CZ medium, is slightly wider, and uses a different follower, it will allow four cartridges to stack.

That's why I recommend a Ruger 77 or CZ medium action. Get the action with the 06 bolt face so it can be opened up for the larger case head size, and order the wider magazine and follower from Ruger or CZ, which is just a drop-in replacment for the standard box and follower.

Frankly, I like the 404 (.423 bullets) idea very much. It's a wildcat that has been tried and is a good one. It would work well in a Ruger or CZ medium action, just as described above.

Of course the 416 Taylor or 423 belted 2.5" or the 416 Ruger would work well in the Ruger or CZ medium action too, without the need to alter the bolt face, or magazine.

The less the alterations to the action, the better I like the cartridge and the project overall.

KB

quote:

Originally posted by Kabluewy:

The wildcat 8x60 Steyr is like the 9.3x64 Brennekee case necked down to 8mm, and shortened by 4mm.

Can you tell me what case head diameter they are?

The cases have different head size, thus requiring different bolt face size. Not a problem


The 375 Steyr case or 9.3x64 case is fatter, and will stack only three in a standard 98 magazine. This is fine for a BG hunting rifle

The less the alterations to the action, the better I like the cartridge and the project overall.

KB

I picked the .375 Steyr case as I think it'll run through a M-98 with no rail work.....but I haven't confirmed that yet. Either in .338 or .358 caliber it should make a fine BG cartridge for a M-98

I can't remember the exact case diameter. My internet isn't working well today for some reason, so I can't access Steves pages for the link to give to you. Try it from your end.

I think you're right about the 338 or 358. Most likely the cartridge can be made to feed well in a Mauser, and some may not require any rail work. But, most likely it will require some work on the rails and the ramp. Also, the fatter cartridge just doesn't stack as well in the narrow Mauser magazine box, especially the Mark X box, and the first or second cartridge down has the tendency to just jump the rails as the bolt is withdrawn above, clearing the way.

The jumping the rails thing didn't happen at all when I tried the 375 Steyr in a Ruger or a CZ with the 2.5" belted mag box and follower.

I wish this basic case had been adopted to a wide range of cartridge, and some had caught on in the U.S. Not having donar actions that need no modifications is my main reason to not have a rifle in some caliber using the 375S or 9.3B case. IMO, it's one of the best case designs ever. It's just too bad that it falls in between the 06 and the standard belted mags.

But of course, for a determined person, willing to spend the money on custom reamer and dies, the obsticles to overcome are not great, and a good gunsmith can make quick work out of it.

KB

the 30/376 ery nearly was a factory round .. and the 338 ot my attention ...

i am hoping for a 338/375 ruger FULL length

One of the posters on The Hunters Life forum, Gitano, did a series of cartridgwes on the 376 Steyr case. One that took my fancy 'cause I had an 8mm barrel was the cartridge that Kabluey has described above, 376 necked down to 8mm. probably very similar to 8mm-06 ballistics I'd have thought, a good round with any of the 200 grains bullets for the 8mm rem mag. I've not done anymore with it but still have that barrel.....
Steve.

I estimate the 8mm wildcat to be about the same perfomance ballistically as the the 325 WSM, which is more than the 8mm-06.

This is simply another example of wildcats being fun to think about, but just not practical. I can't think of a single example of where the Steyr brass can be necked up or down, and find a niche that some factory cartridge hasn't filled.

A few years ago, I got past the thinking about it part, and got custom Redding dies, PTG reamer, Norma brass, bullets, a LW barrel blank, and finally a donar CZ 550 action and walnut take-off stock - all to put together a 323 Hollis, which is simply the 308 Norma necked up to 8mm. It's ready to put together, but I just haven't sent it off to the gunsmith.

It's next on the list to get into the shop. IMHO, the elk hunter's dream cartridge is the 338WM. However, the 323 Hollis is also perfect for elk. There is definately some satisfaction in putting together a wildcat, but to me that's only after becomming a little bored with whats on the shelf. But always in mind is the thought that the wildcat is eccentric. So, I justify it because it's fun, certainly not because it's necessary.

The same applies to wildcats based off the 375 Steyr case. Necked to 8mm or 338, it would really be a good cartridge for elk, etc., but a 325WSM or 338WM will do the same thing, maybe better.

KB

I see making a long neck 284 interesting. The 284 is making a comeback for target shooting. Gaining a few grains capacity by a longer neck and loading out for 06 actions seems intriguing.

wouldn't a 338/376 more or less be about the same performance as a 338 RCM?

could be a really neat cartridge. Better buy at least 250 cases before you commit.

Rich

quote:

Originally posted by Kabluewy:
I estimate the 8mm wildcat to be about the same perfomance ballistically as the the 325 WSM, which is more than the 8mm-06.
[QUOTE]

Yeah, I wasn't too sure about this, didn't think there was a heck of a lot in it, not enough for an Elk to notice anyways.

[QUOTE]Originally posted by Kabluewy:
The same applies to wildcats based off the 375 Steyr case. Necked to 8mm or 338, it would really be a good cartridge for elk, etc., but a 325WSM or 338WM will do the same thing, maybe better.

KB

Except be as easy to make feed perhaps & easier to get 4 down, not that that, is such a big deal in other than a DG rifle. I like the shape of the Steyr case & some of the Pics gitano put up on THL made it look very seductive.
I like the sound of your 323 Hollis too, a 8mm/7mm Rem mag was one of my thoughts for my 8mm barrel before I became aware of the Steyr case.
Steve

I always liked the 376 as it was and maybe as a 338, I looked at one for my wife as a DGR in the Styer pro hunter.

Who can Spanish?

http://www.municion.org/8/8mm376.htm

... or better this:

8-376Steyr

.338 blaser is a little faster than the RCM.

"Round presented in the IWA 2010 Fair"

quote:

Originally posted by HD:
... or better this:

8-376Steyr

Ran the numbers on the 8x376 Steyer and 338x376. Keeping the same shoulder dia. and neck lenght, the 8mm is 76.2 grs of H2O and the 338 is 77grs. A 8x57Mau is 62.3 325 WSM is 79.7 338/06 is 68.7 and a 338 Win is 83gr

Maybe just neck the 8x68S up about .015"?

Rich