ORIGINAL: Tahquamenon
Perhaps the best would be to dump it out.
Although, I personally would likely shoot it up with very light plinking loads.
The problem with using it is it would have to be PERFECTLY BLENDED, or it would vary considrably from shot to shot!
I suppose this would not matter if you were shooting beer cans with it at 25 yards, using 40 grains or so and a round ball.....