Thread: What are these rounds? And why

So over the long weekend we went on our annual tahr hunt early this year. After spotting a bull up very high decided to climb up after it to a ridge that would give about a 400 yard shot at said bull. Only to be shafted buy him standing up and heading over the top, got to the ridge anyway decided to have a rest and glass from up high only to take 5 more steps and run into these. There would have been about 200-300 rounds in a pile up there didn’t have my phone so put a few in my pocket to carry down and take a photo of. We thought maybe it was some kind of army training up there but it seems very weird to be on a ridge in the middle of the hills, and if it was maybe they could have picked up there mess just my thoughts. Anyway does anyone know what these are and used for cheers