Just FYI, I recently got a Little Dandy with one of B.B's adjustable rotors & have used it a little to test out. It's MUCH better than getting all the fixed rotors. My load called for 4.7 grains of H Universal(9mm). My charges varied .1 grain once in a while. Of course one would not easily know how 'centered' you are with the 4.7 charge. I did weigh about each charge until I was sure of it.
You do have to adjust the rotor some until you get the correct charge but it can be done easily from the bottom. There may be a more handy small capacity measure but if one has a 'little dandy' you should spring for the adjustable rotor. I like it mounted on a stand.