doubt that you'll see the bad guys robbing and causing mayhem with C&B BP revolvers but I CAN see an honest citizen trying to defend house and family with one.
That been said, I doubt Obama has reserched the viability of banning BP guns.
I would think he'd see them as a Hobby rather than serious self defense guns, though they do cover the task well!
I think that the absense of supplys is nothing more than some panic buying on the Hobbiests part aand the shortage will recover sooner than the Smokeless shortage.
All Maanufacturers have "geared-up" to take up the slack.