Weird Cartridge

[462]

During my Monday range session, a guy showed me two un-fired cartridges that he had just picked up. Headstamp said 8 mm Mauser (.472" base size), and the case was cut down and bottle-necked.
Anyone know what it might be?

 

[Spindrift]

7,92x33 Kurz? Someone fed their Sturmgewehr, maybe, using reformed cases?

 

[CZ93X62]

A Sturmgewehr in Kalifornistan? Gavin would have kittens, so I HOPE SO.

My thoughts are that someone used 8 x 57 brass to reform to some other caliber. 308 and 30-06 are the usual victims in these atrocities, but maybe the reformer had lots of 8 x 57 brass laying around. Case length, neck diameter, and shoulder form & dimensions might yield some clues. Anything is possible, given form dies and a case trimmer. Rim diameter rules out a 6.8 x 43, which is in the .425" ballpark (30/32 Rem and 40 S&W/10mm).

 

[462]

Thank you.
The similarity is there, but I seriously doubt their is a single Stg. 44 in the entire state of California.
Didn't have any means to measure the bullet diameter, but don't think it was as fat as 8 mm. Too, it was more the length of a pistol cartridge, rather than the longer 7.92X33 or a 7.62X39.

 

[CZ93X62]

GMBTA.

The 30 Luger From Hell!

 

[462]

I thought of .30 Luger or .30 Mauser, but the base diameter was too large.

 

[RicinYakima]

"A small number of Remington XP-100 bolt-action target pistols were made in 7.92×33mm Kurz.

Lothar-Walther manufactures new Mauser 98 barrels chambered in 7.92×33mm Kurz.[20]

Schwaben Arms GmbH of Rottweil, Germany offers newly made K98K rifles in 7.92×33mm Kurz (also known as 8x33 in Europe) in addition to 8mm Mauser and 7.62x51mm NATO.[21]"

SAKO also made rifles in the 7,93x33 a few years ago along with their 7x33 cartridge. FWIW

 

[Bret4207]

Could have been anything based on that base size. People used to make 243 and 22-250 cases out of 30-06.

 

[CZ93X62]

"Pistol-length" sounds like one of the old 38/45 wildcats. Any chance it was a 357 SIG?

 

[462]

Not .357 Sig, not with an 8 mm Mauser headstamp/base diameter.

 

[Joshua]

Do you still have the case?
Break out the calipers and give us some data, PLEASE!!! The suspense is killing me!
We need DATA!
Josh

 

[462]

I don't have them, the guy who found and showed them to me kept them.

 

[fiver]

diameter of the bullet?

 

[462]

diameter of the bullet?

As mentioned, I didn't have anything to make measurements.
I'll venture a wild guess and say the cartridge was along the lines of the Barnes .308X1 1/2", only fatter. An 8mmX1 1/2"?

 

[CZ93X62]

Only Ursula Andress does a better job of getting our hearts started up than does a weird wildcat cartridge of caliber.

 

[Bruce Drake]

.30 BRX....

 

[462]

Nope. It had a pistol cartridge look, rather than a rifle cartridge look, with a round nose/ball bullet, instead of a spire point.

 

[Bruce Drake]

Nope. It had a pistol cartridge look, rather than a rifle cartridge look, with a round nose/ball bullet, instead of a spire point.

I'm away from my reloading gear to be able to grab a photo but I've loaded that .30 BRX with a 110gr RN bullet before.

 

[462]

Is the base diameter .472", the same as 8 mm Mauser?

 

[Bruce Drake]

Is the base diameter .472", the same as 8 mm Mauser?

yep.
And I have an AR15 upper chambered for it. I use a .450 Bushmaster bolt and a 6.8SPC Magazine and I can meet or exceed 30-30 Winchester performance while retaining 30-30Win pressure load levels. (the 450BM bolt is not rated for the higher pressures that you can achieve in a bolt action rifle with that cartridge. In a Bolt rifle, the 30BRX is just under 308 Win performance levels (I have an AR10 for that cartridge).