I have two balance beam scales on my reloading bench. Both are RCBS, but probably actually built by Ohaus.
One is the very reputable 10-10, the other the Elite model 304. Both are great scales, that can be trusted.
But, I also have 2 Chargemaster 1500 setups on an adjoining bench. For pretty well all hunting purposes, they
are just fine. I have checked their powder drops numerous times against the balance beam scales. I have
yet to find any discrepancy between the two types.
I do have restrictors in the drop tubes of the electronic units. It reduces the number of overcharges thrown to
practically zero. I have also checked one Chargemaster against the other one on a number of occasions. No
difference ever noted.
My reloading room is free of any air movement, and I keep any magnetic objects well away from any scale.
Another factor that can affect electronic scales is fluorescent lights. Good to use incandescent or LEDS,
rather than fluorescents if possible. D.