From my experience in 18 years working R&D in an analytical lab for industry... good, reliable electronic scales cost thousands, upwards to 10K.They need calibrated often across the range of weight. A scale that weighs a measured charge for less than $1000? Not for me! You get what you pay for.
Been using the Redding balance beam scale my Dad started out with in the 1960s. I'm comfortable using it and confident of the charges thrown by any of my volumetric powder measures. 'Course I'm not loading for a small army, just me.

John