What are the gradation values on the end of the beam? I understand how the large and small tangs work on the opposite end. When trying to measure out 3.5 gr of Red Dot using a Lee powder measure with calibrated disks, my scale indicates 2 marks below the zero. So.............I'm trying to figure out if the measure is throwing 3.3gr or 3.48gr? Can't find any info on the internet. Comments please. 
