I’d expect to see a lot more soot/burn marks on the box. Judging by the nose of the bullet, it looks like the primer was definitely struck by something.
Dollar to a donut you could hold a round with pliers and hit it with a something enough times to make it go off.
Id like to see the top and bottom of the box, the side doesn’t tell anything except that the round wasn’t in it when it went off.
