This is mostly correct. Over 35 years of loading shotgun shells, I have noticed, however, that there are "families" of components that work well together with substitutions within the family. An example would be for a 1 1/8 oz target load using the Gold Medal hull. This hull has a lot of space to fill. Each component change will have separate data, but good crimps and loads of 1150-1200 fps can be obtained with POWDER ABSOLUTELY NOT AT SAME CHARGE WEIGHTS: Red Dot, Promo, Clays, Clay dot, Green Dot, American Select, WST, Extra Light, and probably others. WAD: 12s3, WAA12, Wt12, Rem Fig8, WAASL and some of the european wads and others. Primer: loads are listed for most commercially available primers by respective powder manufacturers. If the OP could give us an example of his basic load platform he wishes to duplicate and substitute for, some more specific information could be provided.