[John123]

I gave it to my Dad for a Father's Day present; he only fired it with black powder and wadding.

I'm almost afraid to ask but where does your Dad get the black gunpowder?

In a jar at the local hardware store? :)

[DuncanWaring]

Black powder, to the best of my knowledge, is available at pretty much any sporting-goods store. It’s widely used in muzzle-loading weapons.