NitroX
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| (.700 member) |
| 27/07/21 12:31 PM |
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Re: ZIVILMAUSER Mauser Magnum 7x73 S.E vom Hofe
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Quote:Quote:
A caveat first: All “vom Hofe Super Express” ballistics were published well before chronographs were widely available...........
So in 1955 Gehmann simply copied a prewar experimental cartridge, the 7x66 Brenneke Maximum, and offered it as the 7x66 vom Hofe Super Express.
This case is based on a .404 with a slightly rebated rim. The shorter, but fatter case has the same volume as the 7x73, but can be fitted into a slightly opened up Standard length Mauser action. Gehmann advertised it as providing he same ballistics, a 11 g bullet at 1004 m/s.
Pressure tested 7mm SE vom Hofe loads published by the DEVA don’t even get close. The fastest 170 gr loads don’t exceed 890 m/s = 2920 fps. To break the 1000 m/s within the max pressure of 4400 bar, you have to use 8 g = 123 gr or lighter bullets.
kuduae,
I've never heard of the 7x66 Maximum cartridge by Herr Brenneke - do you perchance have any more info on this one or any other oddballs that he played with besides the x64 series cartridges?
Regards
I posted links on it, and there have been NE threads on it as wel - linked to that as well.
Kuduae may have posted on it already, if not, if he is willing, always great to see his comments add to our archived knowledge here. His comment on the 66 here provided new info, suhc as being developed to replace the eralier cartridge.