John, in most states, yes. This will not be an issue. Muzzle loader Regulations by State : muzzle-loaders.com/articles/muzzleloader-regulations-by-state/

In most states yes, some states,counties, cities, require you to ship even black powder rifles to an FFL.
Without knowing where your located I can't give a definitive answer. Repost with zip code and I can help you figure that out

It depends on your state and local laws rather than federal laws. Your best bet is to contact Buds customer service and provide them with your state name or zipcode to determine legality. Customer Service: 1-859-368-0371 9am-9pm EST Mon-Fri. Or use the blue "Chat Now" button at the bottom right corner 9am to 9pm Mon - Sat and 9am to 7pm Sunday. Happy new year!