I "love" my RCBS ChargeMaster. You can program it to optimize (shorten) dispense time for a given charge weight.
Gave up on beam balances in the late '70s. Still have my original Ainsworth and it still works.
For a beam, to "know" where you are, you really need a set of at least ASTM class F2 (I think) check weights. You zero the balance, place a known weight on and record the known weight vs the indicated weight. Do this all the way in weight and you can have a calibration chart.
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