The amount of time spent making black powder seems excessive. The proportion of ingredients seems about right. The output does not seem right. When you make black powder in real life, you put 8 pounds of ingredients together and get 8 pounds of black powder. When you make black powder in OU, you put 8 stones and 8 items of ingredients together and you get 1 stone and one item of black powder. This results in spending 8 hours of making black powder when you should only be spending 1 hour. it seems like the output should be 8 items of black powder and 8 stones of black powder.