The problem with the Lee adjustable charge bar is the cavity doesnt line up under the hopper when you are trying to throw small charges. My solution was to move the cavity backward. You need some JB Weld, thin cardboard like a business card, and some masking tape. Form a little mold with the cardboard and masking tape, pour in the JB Weld and let it set up. After its formed up take off the tape and cardboard, remove any excess JB Weld with a razor blade, and smooth up the whole thing with some fine grit sandpaper. It will look a little something like this when finished.

I like this better than putting a screw in the discs for a couple reasons, first powder cant sit on top of the screw and not make it into the load and second, even though the original numbers on the charge bar dont mean much now, once you have your powder charge where you want it, just take note of the reading on the charge bar and you can easily duplicate it later. I have switched between a few different loads and powders and it couldnt be easier.