Here are four pistol rounds I cannot ID:
Top - The ball is spring loaded and the little “primer” is peened over so the unit stays together. Makes me think of a Hollifield dotter device.
2nd - Why the two rings on the case? w = 240.4 gn.
3rd - Some sort of Ubungs/gallery cartridge. There is a 4mm ubungs round in the base. Any idea what this went to?
4th - Some kind of special blank. What for?