The dr was originally proofed for the 8x57 IR, shown by the bore/land diameter 7.8mm. As the crown of the “Repair” proofmark is partly stamped over it, the old proof date is 11/29, November 1929. At a later date, not visible in the photo, but before 1940, it was modernized to shoot the 8x60RS (.323”) cartridge, 7.9 mm bore/land, with the 10 gramm = 154 gr pointed Stahlmantelgeschoss = steel jacketed bullet. The DWM load #110 was advertised with a mv of 920 m/s = 3018 fps, 26” barrel.