One that is designed for revolvers, not shotguns? (And yes, I know about revolver shotguns, but those are mainly just a gimmick and not really ever used in most contexts. I’m talking about handgun revolvers.)
I mean in the technical sense, so shells ≠ cartridges, and sure they might be capable of it, but it is not really a thing that happens often enough for it to be a normal thing.
I mean, if you look in dictionaries, you’ll see both definitions, but as I said to another user in this thread, dictionaries include a definition because it is common, not because it is accurate. Just look up the term “literal”; most common dictionaries define it as meaning either “literal” or “figurative”.
Words exist fundamentally to communicate something; if a term is defined so as to be ambiguous, it has failed in that purpose.
It’s only been expanded in common dictionaries because the dictionaries practice descriptivism, i.e. they reflect not what is the best definition, but how it’s most often used.
In other words, just because it’s in the dictionary doesn’t mean the word means that in a technical context; it just means that’s how it’s commonly meant when used in everyday parlance.