EXPLODING WW2 Sniper Ammunition

Looking at some rare 8mm that was used by German snipers on high value targets.
CORRECTIONS:
1. This is old/increasingly unstable ammo. To avoid risk(albeit small) of a round getting caught on the chamber ramp and going off, these were instead loaded directly into the chamber. Yes this could damage the extractor but I'd rather damage that than risk the round catching/going off.
2. Hague NOT Geneva convention.
3. This round was made for aircraft but German snipers repurposed it for their uses.