9.3×57mm Mauser
The 9.3×57mm was created by necking up the 7.92×57mm Mauser cartridge. The 9.3×57mm, introduced in 1900, is closely related to the 9×57mm Mauser, even though some dimensions of the cartridge case are slightly different. The 9.3×57mm is still fairly popular among moose hunters in Scandinavia. Factory loaded ammunition with and bullets is available from Norma of Sweden. The 9.3×57mm Norma factory load with a bullet has a muzzle velocity of for of energy, which makes it 10-20% more powerful than the 9×57mm.
Usage
It is used for hunting wild boar and elk in Scandinavia. The 9.3 mm bullets loaded in this cartridge come in 232 and 286 grain weights.Reloading
Cartridges of the World lists reloading information for both the 232 and 286gr bullets using IMR3031 powder as well as showing a Norma factory load.The loads listed in Cartridges of the World are valid, but dated. The loading information has not been updated to reflect newer powders than IMR 3031.
C.I.P. https://bobp.cip-bobp.org/uploads/tdcc/tab-i/9-3-x-57-en.pdf