As you prolly figured out for yourself, the common or garden variety of .22 bullet is not quite so simple as it looks at first glance. It is, in fact, a heeled bullet, that fits into the case by a cunning reduction of the bullet diameter, and therefter conforms to the internal diameter of the barrel. I have not the slightest idea where you might easily buy such a bullet, let alone where you might obtain pre-primed .22 rimfire cases.

A supplier such as Mr Allwood might be able to help out with the bullets, but the matter of the cases may well be an insurmountable one.

tac