I set about this weekend to load 500 110gr. FMJ .30 Carbine since I stumbled on the components I bought years ago. Set up the Hornady LNL AP with the LNL powder measure that came with it and started to go to work. After some 20 cartridges the Powder Cop didn't look right, too high on one. Turned out the case held 19+ gr. of H110 instead of the planned and set 14.5 gr. I tore down the rest just to be sure of the load, the rest held between 14.2 and 14.6gr. Okay, try again. Same thing, after 20-some cartridges another grossly excessive load.
This ain't no way to treat a 1942 Underwood Carbine! Well I busted out the LEE Auto Disc, made the needed adjustments and began throwing charges, a bit on the light side, but a depth adjustment took care of that to within 1/10 gr. I was throwing 14.4gr. instead of the 14.5, but that was okay. The LEE went through 505 .30 Carbine on the LNL AP without a hitch or hick-up. Of the loads I weighed, I had a low of 14.3 and a high of 14.5gr.
The LEE Auto Disc Pro did exactly what I bought it for, more precise small charges quickly, consistently, and accurately. I had not tried it on the progressive before, but it's money well spent and out preformed a measure more than twice it's cost. Highly recommended.