I load a #0 buck pellet in 32 Longs with a charge of 3.5 grains of Titegroup and they are actually surprisingly accurate and powerful in my 32 revolvers. Just flare a good bit and seat the ball to where the roll crimp retains it in the case. The seater/crimp die winds up swaging the ball into the case and leaves a sort of wadcutter looking end. I've recovered them from shooting up a junk car and they'll go through a car door and flatten nicely.
Too bad Hornady discontinued #0 buckshot in the 5# boxes. Lucky I heard about it and bought 3 more boxes!