Below is a photo of two 7.62x39 cartridges.
The first cartridge I have identified as a Chinese made blank. It is a copper washed case and headstamped 31 87. Can anyone confirm this tentative ID?
The second one is weird to me. The headstamp is 05 85 Spreewerke East Germany. The bullet(?) is glossy black with a round nose and magnetic. This cartridge feels lighter than a normal ball round. I wonder if it is type of short range practice round? Any help to ID its type would be appreciated.
Thank you all.