I think something that has been kind of glazed over should be mentioned here. Any caliber rifle, can shoot a round ball with good results if you work up the load it likes, and stay within that load, and calibers, range. But, just because it can be done, doesn’t mean it will be easy. Big caliber fast twists, and small caliber slow twists, are going to take a bunch of range time to sort out. That is why so many antique rifles are 1in48” twist, it’s the most universal twist.
Hungry Horse