R. Marshall,
Will a 7.62x54R rim fit the bolt face? If not, will the 8x57IR ? If neither will fit, it is not a rimmed cartridge. Have you slugged the barrel yet? 9.3x57 was a popular cartridge for moose hunting in that part of the world, but unlike the 9x57-9x57R(popular in Germany) there was no rimmed version of the 9.3x57. The older 9.3x57R is the German version of the English 360 2 1/4" Flanged, instead. There is a second 9.3x53R that is not the same as the Russian cased version. It is the Swiss version, which has a head diameter of .492-.494",and rim diameter of .563", which is a larger head size than the Russian case. This can't be the cartridge either, then. There is just not enough information to be able to ID the cartridge, If there are no marks on the bottom of the barrel, it will be necessary that you make a chamber cast.
Mike
Last edited by Der Ami; 04/14/20 06:39 PM.
