First of all, be sure it was made to be used with smokeless powder loads, or load black powder. As a rule of thumb, if it doesn't have a positive cylinder stop (the cylinder can't be revolved when the hammer is down, and the trigger forward) it should be used with black powder.
Lyman lists a load consisting of a 71 grain/ jacketed .312 bullet usually used in a .32 ACP, backed with 2.0 grains of bullseye. Be careful! 2.5 grains is maximum for use in hand ejector (not top-break) revolvers.