Now, I usually load somewhere in the middle between the minimum and maximum suggested loads. Can't do that with dippers, unless you custom make your own.
I've always used fancy adjustable powder measures, but I'm thinking about making dippers for my favorite loads for when I want to load just one box (or a handful) and the powder measure is set up for something else. Just a piece of wire and a empty cartridge case; file it down until it holds the right amount of powder. 9mm and .40 cases look particularly useful.