I use the Harrel pistol measure. I drop into the scale pan on a electronic scale. I can't tell much in accuracy difference between my Lyman 55 and the harrel.
But I do notice both measures will drop a lite change every now and then. Don't know why but it happens. Some powders seem to be more consistent like AA 5 or Power Pistol compared to Unique.
The Harrels micro adjustment is 1 click to a 1/3 of a 10 th of a grain. This allows some really fine tuning.