It's not complicated if you are loading 2 3/4 AA with 18gr.of red dot and an AA wad.low pressure short shells is another story .pb was a great powder to use but is discontinued some other good powders too.i went through this but I have 8 lbs of pb and I am loading 7/8 oz 12 ga loads and using bp wads.ane a lot of supplies are hard to get good luck.