Good set of scales is the key. Beware of cheap digitals. For turkey loads, I individually weigh and load powder per shell. I noticed in one session that the shot was too far below the wad opening to be correct. It was the scale. I've had for four decades an old RCBS 10-10 balance scale and completed the loadings with it feeling secure with its readings. I have upgraded digital scale to a Lyman which checks out so far as excellent, but I verify every few loads with the RCBS. Gil