OK, I see where you're coming from, Lloyd. I'm certain that they're very close in many (most?) cases, just as 748 and BL-C(2) are. I believe that the military and/or OEM designators are:
WC846 = BL-C(2)
WC844 = H335
WC748 = W748
Now, they are all manufactured by General Dynamics at St. Marks, FL, but then again that facility makes a WHOLE bunch of Ball (how do you make that trademark symbol?) powders, including Alliant's entire new Power Pro line.
760/414, 296/110, and 231/hp38 are the only ones that I can think of right now that Hodgdon agrees are the same powders.