37mm Vigilante cartridge on gunboards

I was browsing gunboards earlier and found this, the guy is not sure if it is inert or not.

Is it a live round or a dummy?



I’ve seen listed for sale a sand filled dummy for function testing the T250 gun that has a black projectile. It was described as having a brass plug with two spanner holes in the primer pocket. Sounds a lot like the item in question.


Unfortunately, everyone told him to turn it over to the police, so it has probably been destroyed by now.