I'm wondering if anyone can help me identify the cartridge I have had sitting above my reloading bench for some time. It is definitely a 6.5mm cartridge. The bullet measures 0.261" (6.66MM) in diameter at the case mouth, the case length is 1.981" (50.30MM) and both the rim and base measure 0.446" (11.32MM) in diameter.

The curious thing is that this case is headstamped with what appears to be "DM 42" which I would assume means Des Moines Ordnance Plant in Iowa, 1942 production. However the dimensions of the case almost match a 6.5x50mmSR Arisakaicon cartridge.

Is this a 6.5 Arisaka cartridge? And if so what were the Americans making this in 1942 for?

Attachment 93866
Attachment 93865
Information
Warning: This is a relatively older thread
This discussion is older than 360 days. Some information contained in it may no longer be current.