I have a 575 round ball mold and a .58 caliber rifled musket. They only work together for me if I have a long, fiberglass range rod to ram the patched balls down with. You aren't going to be happy in a hunting situation with that size ball and the itty-bitty steel rammer the rifle is equipped with. A 570 ball is better but only JUST manageable with the steel rammer by using a palm protector over the little end. If you aren't hunting though, a range rod is no problem.
I've found the minie wadcutters, the ones which look like miniature garbage cans, are good from my rifle, lighter than regular minies, pleasant to shoot, easy loading and accurate enough for 100 yard deer hunting. I never know if the gun kicks when I'm hunting anyway.