I have a third model, and yes, I've shot it sparingly. It is surprisingly accurate, but its bore is pristine.
They were chambered for .22 Long or shorter cartridges. A .22 Long Rifle won't quite clear the cylinder.
I only shoot mine (along with my .22 Short tip-ups from the post-civil war era) with .22 CB Shorts. Many people don't even advise this, but a gun in good condition shouldn't be harmed by these very light loads. Don't use High Speed shorts or the like, even in the Ladysmiths. Stick to the subsonic 'gallery'
type loads.
Chris