I'd hang some kind of warning sign on the belt, just to make sure that in any case, no-one else will have the bad idea of trying to fire them. You never know in life...
I have some older Carcano ammo from wartime, and I have put them in a container with a warning on it.
Sgould anything happen to me, I don't want my son or someone else to have someday the bad idea of trying to fire the old warhorse with that ammo.