I have in my collection two rounds with Utendoerffer headstamp. I don’t know anything about these, not even the proper caliber name. Here is the first one:
The bullet diameter is around 12,7 mm, and the length of the case is 44 mm. Here is also the headstamp:
The second round:
Bullet diameter: 7,95 mm, and case lenght: 57 mm. It is very close to the .303, but the rim diameter is smaller, 12,3 mm, compared to 13,4 on the .303. Here’s the headstamp on this last one:
I would appreciate your information.