I have an old copper rimfire cartridge from a friend who’s grandfather was in the span-am war, it was with several of the same cartridges in a civil war era belt mounted copper round hinged (kittredge?) box. It’s measurements don’t seem to fit within the normal .44 rimfire cartridges, the diameter is slightly smaller and length different. There is no headstamp:
length of case: .960
length of cartridge: 1.5"
Bullet diameter: .437
rim thickness .05
two exposed lube grooves, slightly pointed ogive bullet
rimfire, no headstamp, copper case.
Is this a spanish or european rimfire cartridge of 43 cal?
Any help appreciated.