Had one of my own making years ago. Had a .45 squib load, and saved the SWC bullet, seating back in the case. Punched a hole through the sidewall, got a keyring, and carried for a while. Got into an argument at an airport in 86 with a security guard about whether it was ammunition or not. She won. Gave the thing to my girlfriend at the time, and she lost it before she could send it to me.
I might have some SWC boolits around here somewhere... I could make you a replacement.