That would be pretty cool. What a great idea.
I have exactly one muzzle loading pistol, an old Lyman Plains Pistol in .54 caliber. I built it as a sidearm to carry during our muzzle loading seasons way back when. In the interim, cap and ball revolvers became legal sidearms, so I bought a Ruger Old Army to carry instead. Now we can carry any sidearm (as can archers) so that we can "defend" ourselves when out hunting. Not sure I agree with that, but whatever.
The Plains Pistol is one hell of a little powerhouse, if you can stand to shoot full charges. With a 230 grain .530" diameter round ball, a full charge puts it right up there in .44 magnum territory. I actually killed a pretty nice mulie with it one year, just because he was so close and it was pretty much a chip shot.