I didn't know anybody actually bought "Moose Milk" instead of making it. All it is is a half cup of water soluble oil ( from the auto parts store), and a half cup of (I think it was originally 409, but now is Simple Green, or Awsome) to a gallon of water. 409 wasn't cold water activated like these more advanced detergents are today.
I used to make, and market, some of the blackpowder solvents, and patch lubes, years ago. But, I stopped making them, and started doing Black Powder 101 seminars, because the warning labels required to sell this stuff is larger than the bottle.
Hungry Horse