I have loaded almost 10,000 rounds through my Dillion 650 and the powder measure does not vary more than 0.1 grain. For example I currently have it setup to drop 4.6 grains and when it varies off of that it will do a 4.5 drop once in a while but not very often. Never a 4.4 or 4.7 drop. To me this seems pretty accurate, is it not?