Is there rifling in a black powder ball muzzleloader?
It would depend on the type of gun,for the most part anything
that is called a "rifle" has rifling in the barrel. A musket
generally doesn't have rifling and is considered a "smooth bore"
There are cases in both instances that cross the line such as
rifled muskets (used in the Civil War) and weapons mistakenly
called "rifles" as in you will hear a Brown Bess or charliville
musket called a rifle. There are also guns called "Fowler's" these
are for the most part smooth bore and meant for shot, but can also
fire a ball, much the same as the musket.