First of all I am NOT talking about mixing different powders........ just powders of the same type. I have always tried to keep several pounds of the powders I typically use on hand and with the run on ammo and loading supplies a couple of years ago I really increased my stock. In some powder types I have several 5 or 8 lb jugs as well as a number of 1 lb. I like having the stock and have started just re-ordering as I use so as to keep quite a bit in stock. I have a sealed very low humidity room I keep all my powder and primers in so they should keep for a long time. All that to ask this question..... Say if I have for example, 3 8lb jugs of US869 and 10 or 12 1lb cans. All are from different lots. Rather than having to change or verify my loads each time I use a can and start on a different lot # of powder, what would be wrong with taking ALL the powder and mixing it together real well. It seems to me this would effectively make the entire amount have the same characteristics, and would be like having all the powder come from the same lot. Has anyone tried this or know of any reason this would not work, or would be dangerous?? I know I would need to mix the powder in an anti-static container, but other than that I have not come up with a reason this would not accomplish my goal of a large quantity of powder with the "same lot #" characteristics.