Well Bob in St. Louis you are in good shape with your herco with a heavy payload , the wads are more of a 1-1 1/8 oz but you can find some 1 1/8 herco loads , the buckshot is interchangeable with lead shot data just count and weight for amount , lee has data out for the slugs , but one of the most important ingredients is the hulls , and that are not the same . Not just 3 or 2 3/4 inch but the tapering of the hull and the base of hull will affect the pressure big time . I have smashed out 12s for over 20 years with my lee load all , you can mix up all kinds off loads with the bushings that come with it . Sit down and load a hundred right quick or mash out a box to go hunting with . I have loaders I can load a lot more on , but I don't have a loader I have had more fun with . Be safe and do some pattern test on your shotgun , pop can patterns count to *** well as paper just don't know wear the ones that missed went .