blkpowder
PowerBelts are really nothing more than a 'elongated' round ball - so do shoot them pretty much like round balls.
They do not need a patch as the plastic skirt takes the place of the patch. Lubrication is not necessay either, if they are copper coated or even if they are all lead - either fouling is not a huge deal, althought it will have to be delt with sooner or later.
the way the PB works is the bullet is actually smaller than the bore and that makes them really easy to load. When the charge ignites the plastic skirt retains the pressure than the bullet swells (obterates) to the size of the bore - grips the lands and rides out the barrel.
Use round ball like charges on these - do not overdrive them. You do not say what weight they are so suggesting a powder charge would not be the best thought for me.
There is nothing stating how much this bullet weights
Gee that is odd - surely can not help you now... Someone with a lot mor experiance with PB's will jump in help shortly I am sure.