When I first started handloading many years I carefully weighed every
charge and would not even consider buying a measure. Finally
realized what a tremendous waste of time that was and acquired
several measures. After a few spills and having to start over using
loading blocks I quit using them. I now charge one case, look inside,
pick up a bullet, start it and seat it. Once I pick up the case I don't
let go of it until it's a loaded round. A foolproof method in my opinion.