I got a cartridge from TonyE which I think is a 7,62 Nagant factory dummy. It is headstamped “38 78”. There is a 2.5mm hole drilled in the side of the case 10mm from the case head. There is no primer cap. The bullet is a lead wadcutter which is seated 9.5mm below the case neck. Is this a known factory dummy cartridge?
Thanks for any info.