Several thoughts on all above:
Reccomendations from the Dixie Gun Works catalog should be taken only as guidelines. There is much 'information' in the catalog but not all is the best and some may even be unsafe. You still need to use your head and consult with other experienced shooters.
Compressing the load in a C&B cylinder is OK. Methinks the amount of pressure will be limited by possible damage to the loading lever and/or the hinge pin. If you load the cylinder out of the gun just don't use too big a hammer.
Most importantly is to work up loads that work for you. Testing and shooting is the fun part.