i think i heard somewhere once that some military loads are a mix of two different powders to get the exact performance that they're looking for. The hugemongous commerical manufacturers that produce on contract for the US government might have some kind of setup that drops two different powders into a case at the same time or consistently blends the two powders.
Theoretically you may be able to work up a safe load with that stuff if you could keep the two powders mixed consistently but i cant think of a method that would work reliably.
that being said, i would bet your face skin, eyeballs, and fingers on the fact that theres no way that you are going to be able to throw that powder through a powder measure and into a case with any level of consistency where the ball powder doesnt settle down to the bottom of the hopper and leave the stick powder on top. You wont have any way to keep the mix consistent during the loading process.
i say messing with that stuff will give you a 70% chance of personal injury or damage to your firearm. I would toss it and buy new stuff. Powder is still cheaper than plastic surgery.