I know someone will recognize this one right away, need blank ID. Details are as follows:
- 78.4mm (3.08 in) OAL
- 13.7mm (.4 in) rim diameter
- Where the “projectile” base is, is about 7.7mm.
In the picture is this blank next to a .303 and a 54r cartridge. It seems to be in the middle. No headstamp on base and even the base isn’t quite like the other two.