Lee's powder drops use a calibrated orifice in a disk to dispense a given volume of powder which is converted to a weight using a number called VMD "Volume Measuring Density". As powder goes, you'd be hard pressed to find a canister powder for less per pound and most surplus is up at that price point. PROMO is commonly available for around $10.50 a pound. Perhaps the newer design Auto-Disk would resolve this with the wipers and better hopper design. I did see some flakes escape between the bottom of the hopper and top of the disk but this tends to happen with very small ball powders like Accurate #9 as well. In my Lee auto-disk powder measures it was repeatable and reliable with no bridging or clumping. This is not a noticeable problem however. It is a little bit fluffy and seems to have more static electricity issues than the ball powders I normally load. It appears as thin wafers approximately 1mm in diameter, coated dark grey with graphite. I was told that PROMO is actually the "old recipe" RED DOT from before the product change to "New, Cleaner Burning RED DOT" on the label, and without the red taggants. My conversation with the Alliant techs revealed that they say it can be used as a substitute for RED DOT when measured by weight, not volume since the density is different. It is only sold in 8# kegs and Alliant publishes only shotshell data for this powder. PROMO is a powder marketed by Alliant towards bulk shotshell reloaders and gun clubs. During this time I started messing around with Alliant PROMO powder. Some time ago I started toying with the idea of trying to find the absolute cheapest loads I could possibly make, while still maintaining accuracy, reliability, safety and cleanliness, and using commercially available components- no old surplus or garage sale stuff.
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