Unknown 10mm/0.40 inch x 70mm/2.75 inch calibre cartridge.
I have this fine looking cartridge, in excellent condition, which needs a name! It is brass cased, with a copper primer, no headstamp and with a paper patched lead bullet. There is no shoulder to the case, just a straight taper to the beginning of the neck.
The dimensions are:
Cartridge overall length: 87.2mm (3.43”)
Case Length: 69.9mm (2.75”)
Bullet diameter (over patch): 10.35-10.4mm (0.407”-0.409”)
Bullet diameter (in front of patch): 10.1mm (0.398”)
Neck diameter: 11.0mm (0.433”)
Neck length: 16.0mm (0.630”)
Head diameter (in front of rim): 14.8mm (0.583”)
Rim diameter: 16.75mm (0.659”)
Rim thickness: 1.65mm (0.065”)
So ladies and gentlemen, what have I got here please? P.S. I just checked, the case is not bent as it may appear in the image above, I think that it rolled a trifle on the scanner part way through the scan!