I have been reloading .45acp with Titegroup and 200gr SWC as per the reloading data that came with my Pro 1000. The Pro 1000 comes with the auto powder feed and the data states to use the .40 disk setting, which according to the data should dispense 4.8gr of powder. I check the powder with the Lee safety scale and it consistently seems to come in at 4.4-4.5 gr in weight. I do zero the scale every time I start and check the load every 50 bullets or so, any ideas why the auto dispenser and scale disagree?