[WWWJD]

I think generally speaking, you can expect variation with the autodisk regardless of powder type. Some are more problematic than others. I use the double disk kit with stick powders. I consider the chart provided by Lee as just a learning tool only; it's not quite right (at least for large volumes of stick).

What I wound up doing is setting up a set of disks, dropping and measuring 20 charges on the scale. I logged this in excel to see what the variations were. Depending on the disk combination, the spread would be better or worse on average. I don't have the spreadsheet here at the office to show you, but the random swings in charge weight seem to be manageable. I was hoping for better, just so I wouldn't feel like I have to trickle every charge.

I haven't loaded for pistol, but I suspect you'd see the same performance variables for the smaller stuff with ball and flake (I'm playing in the 40-46gr ranges).