I’m assuming this is inert although I wouldn’t set it next to a fireplace. How do I know if it’s live or not? Did these have loose powder inside or cordite? I realize cordite would not rattle. It has a good hollow ring to it when i put it up to my ear and tap on the brass. At any rate it’s a nice specimen I think. I normally collect martini henry ammo and big game english hunting rounds. This was offered to me and I am considering accepting it. I sent this question to John Spangler and he said the next volume on the 37mm will have the loaded shell weight so perhaps that is my only sure way to know. The projectile is quite solidly in place.