The Lee data is very off with Unique, your scale is fine (at least with regard to what you are seeing). Many powders are just slightly under what the Lee chart shows for the cavity, some dead on (like W231/HP38) and one or two I loaded in the past, heavier than the chart said it would be for that cavity.Anyone here using the Lee auto disk powder measure?
I have one that i was reviewing the data on and have a question.
Loading 9mm with Unique and the chart that comes with it shouws that the .57 disk should be approximated 5.2 grains, but upon measuring the throw, the scale (lee scale) indicated 4.4 grains.
When i use the .61, should be around 5.6 but scale shows the throw at 4.8.
ive zered the scale many times so i'm confident in its accuracy, and realize the data fr the disk Lee provides are approximates, but does everyone else experience such a great variance?
I used the auto disk with success for a lot of rounds, I preferred the round hopper over the square one (I think they call it the pro model). If you have this model (round hopper), make sure you screw down the Phillips screw that keeps it from closing on its own. I bumped my hopper once when it wasn't tightened and made a bunch of rounds that were under charged, stuck a bullet in the barrel, (very bad outcome, lots of pounding to get the jacketed bullet out of the barrel, then lots of pounding to pull the remaining bullets).
For a scale, I prefer a beam scale. Dillon sells a good one. I have an RCBS 1010, not sure they even make it any more, great scale. If you don't already have some, get a cheap set of RCBS check weights, always a good check.