Does it exisist a .30 or 7 mm wildcat on x64 Brenneke case?

14 October 2003, 00:21

I own a M98 rifle in the fine 9.3x64 Brenneke.
I have for a long time been searching for a "wildcat-project" on the x68S case, but have "overlooked" the very fine x64 Brenneke case ...
Does anybody know of wildcat-designs for .30 cal or 7mm on this case?
(does anybody have data or experiences to share?).
Yours [Smile]

14 October 2003, 00:37

Jedi

What kind of performance could be expected compared to 300 Win.Mag or 7mm Rem.Mag.???
Is wildcatting with basis in this case worth it?
(- besides "getting rid of the belt"...
Arnold Arms have stated that a fireformed belted case gives "better" headspacing than a non-belted). [Smile]

14 October 2003, 00:39

carcano91

Yes, such a Spanish 8mm exists (and Lutz Moeller's 8,5 x 64), and both have been mentioned here in the past.

Carcano

14 October 2003, 01:26

jeffeosso

If I remember correctly, the black nosler reloading manual has loads for them both, and a 6.5???

they are the equilivant more or less of the 7 mag and 300 win.

that is, of course, if i remember correctly

jeffe

14 October 2003, 04:40

carcano91

No, Jeffe, it hasn't.

The closest German equivalent to a 7mm cartridge on a fatter case (like the 9,3x64 diameters) would be the 7x66mm Super Express vom Hofe, but that's a factory round.

Regards,
Carcano

14 October 2003, 07:37

dantec

there is a 6.5x63 base on 9.3x64 case too , 9.3x64 case are good but very costly

good shooting

DAN TEC

15 October 2003, 01:37

Jedi

Carcano91 - do you know anything more about the 7mm Super Express Vom Hofe? Some german site said that this was a "slightly larger diameter 7mm than the american standard" - is this true?
- Who loads for this round? RWS? ...
The case is 2mm longer than the x64 ... Is it possible to form brass from x64? (- Does these 2 mm get realized through necking down and fireforming?).
Yours

15 October 2003, 05:54

carcano91

quote:
Originally posted by Jedi:
Carcano91 - do you know anything more about the 7mm Super Express Vom Hofe?

Performance is almost equal to the smaller 7mm Rem Mag, the latter even being a bit superior with some bullets. The 7x66mm SEvH from 1955 is just a lot mor expensive and feeds on more propellant, but does not yield more performance.

quote:
Some german site said that this was a "slightly larger diameter 7mm than the american standard" - is this true?

Its CIP bore dimensions are exactly the same as the 7x57 and 7x64 - which indeed means, *different* from the US "7mm" standards.

quote:
- Who loads for this round? RWS? ...

Proprietary by Gehmann. I do not know who actually fills the cases.

quote:
The case is 2mm longer than the x64 ... Is it possible to form brass from x64?

Nope. Base of the 7x64 is far too small. The 7x66mm SEvH uses a rebated case with R1=13,00 mm, P1=13,85 mm, P2=12,70mm.
The only possible cartridge for reforrming (with immense work) might be the .404 Riml NE.

Carcano

15 October 2003, 08:29

jeffeosso

Carcano,
A quick check in quickload reviels
6.5 x 64 Brenneke
7 x 65 R Brenneke
7 x 65 R Brenneke R

but not a 308...

jeffe

15 October 2003, 08:43

carcano91

Jeffe: yes, but these cartridges don't have anything to do with the question asked by Jedi.

Carcano

[ 10-14-2003, 23:45: Message edited by: carcano91 ]

15 October 2003, 14:51

jeffeosso

he asked

Topic: Does it exisist a .30 or 7 mm wildcat on x64 Brenneke case?

the 7 does...

i THOUGHT the 7.62 did

jeffe

15 October 2003, 19:22

carcano91

Jeffe: I am right, you are wrong, but it's all the original question's fault and merit, not ours [Big Grin]

.

Jedi asked about the 9,3x64 case, which he saw (quite reasonably so) as a good base for wildcatting. His fault was the use of an uncalled-for ellipsis "x64", which language use makes no sense except for leading some readers astray from his intention. Because: the 7x64 and 8x64 Brenneke are built on an altogether different case than the 9,3x64.

Regards,
Carcano