Know this is an old thread and all, but for what it's worth I use a Lyman Gen 3 electronic dispenser. It's usually about .2 -.3 of a grain out by it's 'own' confession. I 'always' use it in conjunction with my RCBS 10:10 balance beam scales and deliberately set the Lyman light, as (for example) 59.7 grains of powder can easily be 59.9 (or sometimes more) on the balance beam and then I just top it off with a manual powder trickler. 'Generally' (due to the bigger cases I load for) by the time it's spat out another load into the tray, I've already trickled the required amount of powder into the pan on the beam scales, and have placed it into the cartridge case, so there's no time really lost, unless, as some have suggested, you help the electronic scales out by dumping a load into the pan to give it a head start, which I've never done!
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