I load my Knight KP1 with two .50 caliber 50 grain pellets of 777. Then I load a Barnes Expander .45 cal bullet into a .50 cal harvester sabot. For primers I use Winchester 209 shotgun primers, I also have some 777 muzzle loader primers but I haven't tried them yet.
This is basically all you need to clean your muzzle loader after shooting it -
Knight Rifles