I have been looking for a set of reloading dies for 9.5x57 MS. I have found dies listed as 9.5x57 Mauser. None of the cartridge references I have show a 9.5x57 Mauser cartridge. Are these the same cartridge or is the Mauser version different?

AFAIK,,the 9.5x57 Mauser name was used by at least some reloading company(s) on the Mannlicher Schoenauer edition of the cartridge reloading dies.

These dies are for reloading the 9.5x57 (56)mm M/S cartridge for the 1910 M/S rifle.



If there is an actual factory Mauser cartridge, I don't know, but likely someone here does.

The M/S rounds (1905.'08,'10) do have a very slightly smaller base dia than the standard Mauser x57mm cartridge's.
Some M/S rifles will accept rounds made from 8x57 and other common cases.
Others will require the base to be very slightly reduced in dia.
Both my 1910M/S rifles require the reduction in dia.
One of my 1908M/S (8x56mm) does not need the reduction in dia. The other does.

Also....
CH4D catalog on-line offers this comment regarding 9.5x57M/S caliber dies...

"9.5x57 Mannlicher Schoenauer is an alias for 9.5x57 Mauser / MS.
The dies you receive will likely be marked with the more common designation."


And then there's this from the Cast Bullet Forum.
This seems to suggest in at least one persons opinion that the two cartridges exist and that they are different,,at least in some small amt.

https://castboolits.gunloads.c...ex.php/t-163385.html

There is no mention of a 9,5x57 Mauser in Dixon's meticulous two-volume set "European Sporting Cartridges". In his section on Mannlicher-Schoenauer cartridges he does explicitly say that, contrary to the 1905 9x56 M-S and 1908 8x56 M-S rounds with a base diameter of 11,85mm, the 1910 9,5x57 M-S used the larger 11,95mm base diameter of 'standard' Mauser rounds.

This has also been my experience with loading these three rounds. The 9,5x57 1910 M-S rifles would all accept cartridges made from any common 30-06 brass, while the 1905 (9x56) and 1908 (8x56) rifles would only accept cases made from Winchester brand 30-06 or 8x57 Mauser brass; other brands are just enough larger that they usually won't chamber in 1905 and 1908 rifles.

The British 375 Rimless Nitro Express 2-1/4" is the same cartridge as the 9,5x57 M-S. Oddly, though, Fleming's book "British Sporting Rifle Cartridges" gives a rather unspecific date of introduction for the 375 rimless nitro as "pre-1909". Go figure.

I think I still have my RCBS dies for the 9.5 X 56 M/S that I sold years ago. A fun rifle but very anemic in the realm of knock down power. Although a 375 calibre, the next year Holland + Holland blew them completely out of the market. I found it a lot of fun playing with cast bullets for this one.

Thanks to all for the information, I really appreciate your sharing your knowledge with me. I found a RCBS set with the box labled identical to the one above. The dies themselves are marked just 9.5 x 57. Based on the above, I am confident that they are correct and am planing to buy them.