yessir, the smoothie is a good all around gun that can do both shot and ball, with the ball part being the tougher nut to crack ... sometimes. it will usually take experimenting with load data - bp powder granulation, charge weight, ball diameter and how the ball is loaded (patched, towed, wadded, bare, and if left smooth or file knurled). lotsa trials, but that's half the fun and a good reason to be shooting (besides hunting).
fwiw, i don't like naked lead down an ml barrel so typically i start ball load experimenting with different patch thickness's that are very well pre-lubed with melted in "gato feo" bpcr lube. i use swiss 3f because there's less fouling to deal with, and with a smoothie there are no grooves for it to hide in so it might need cleaning 'twixt each shot. the last smoothie i had (from chris walker, and just sold) was a .62 that had decent pie plate accuracy to 50 yards without fouling control between more than a few shots using a .600 ball (lee cast) and a well lubed .010 patch strip, 3f in the tube (70 grains) and in the pan ...