I have two of the Pedersoli .32 Frontiers, one cap one flint. Both like a load of 30 grs. Goex FFFg, .315 Hornady ball and a .015" oiled patch. At 50 yards I've had 3 shot 1 1/4" groups.
Shooting the flint is kind of comical in a way, there's almost more flame/smoke/commotion going on in the pan than there is at the muzzle!