Hmmmmmmmmmmmm...
Not familiar with that powder since I don't have a .308 Win. Is that size charge (42.8 grains) even up to the "published" suggested starting load of that powder with a 168 grain bullet?
This is also starting to make a LOT more sense to me. My Lyman 55 Powder Dispenser will "throw" load after load within 1/10 of a grain of powder with boring consistency... a load as good or even possibly BETTER than an individually-weighed load when weighed by an "average" reloader.
I thought you meant you were "dipping" your powder load.