Hi, could someone please direct me as to where I can find Blackhorn 209 to black powder tables.I do not know how to word question? If a 120 grain charge of blackhorn is the equivalent to 150 grains black. How do you measure smaller charges to equal black powder charges. For example Pyrodex said to reduce charges by 20 pct. to equal black pressures. I.E a 35 grain charge of b.p would be a 27gn. Pyrodex load.