A classic 196 grain full metal jacket in a brass cased Berdan primed cartridge (it can be reloaded with some additional work). This is military surplus, so it is somewhat hot compared to U.S. 8mm.
Lacquer on the primer helps to keep this ammunition storable for the long-term.
This stuff is robust, powerful, clean (for mil surplus), reliable and good looking. It is somewhat corrosive so you should clean your firearm after each use.
Whether it’s out of a plain jane Mauser 98, or out of something with a bit more firepower (like an MG15 or a FN49 or an MG 42), this is quality, value priced ammunition that you will be proud to shoot.