i haven't used a beam scale since i bought a Dillon D-Terminator about 25 years ago. there are several ways to keep tabs on it during operation.
with the empty pan on the scale it should read zero. with the pan off the scale, it should read the negative value of the weight of the pan.
when setting up the powder measure, i dump five (rifle) or ten (pstol) charges into the pan and weigh it, divide by the number of charges weighed and you have an average.
