Unless you obtain a concealed weapons permit, it is prohibited.
Gun transfers in California must be carried out through a licensed California dealer where neither party to the transaction is a licensed guns dealer.
Compared to black powder, smokeless powder has far greater potency. Smokeless powder makes it easy to blow up any muzzleloader.
Shotguns have chokes, not shotgun shells.
No, black powder is not nearly as potent as smokeless powder.
Kids' Rules are:
1. Cease!
2. Refrain from touching!
3. Get Out of There.
4. Speak with an Adult.