I did a search today for "Metric Centerfire Rifle Cartriges", I found three different 9.3x72R cartriges

9.3x72R

9.3x72R Sauer

9.3x72R Nimrod

All of these rounds are pretty close, but the Sauer and the Nimrod have a smaller rim dia.

Did some more checking for fit on a Emil Eckoldt, Suhl, drilling (no proof date) and found that the rim size on the oldest(?) rounds were to large for the extracter and the base dia. just ahead of the rim to large

My education continues.