I gave away about 3 pounds of old formula Unique powder years ago because it was filthy. Now I am looking at loading some high velocity 1-1/8 oz 12 ga loads for a bird hunt. Looking at the Alliant guide; to get to 1300 fps my only options are Unique, Herco, or Green Dot. They claim the new formula Unique if 50% cleaner burning. Does anyone have any experience with these powders? What is the lesser of three evils? Using an auto loader so i want the cleanest burning option.