My Dad has an almost full box of pinfire bullets - Lefaucheux 7mm they came with the antique pin-fire revolver he purchased from a dealer. He had them tucked away in a drawer for at least 25 years and if they are the same age as the revolver, that means they could be 100 years old (we think it’s Belguim as found ELG stamp on it) My question is about the stability of these bullets. How do I know they are safe and won’t suddenly degrade to become dangerous - or doesn’t it work like that? I have suggested he hand these over to be safely destroyed. Any advice welcome - thanks!