The newer beam balances from the "reputable" suppliers nowadays sadly are all made in china with questionable (ok rather non-existent) quality control, as such they are hit and miss. They generally state +-0.1 of a grain as their repeatability. You be the judge whether that is sufficient for your (hunting) loads.
There is (was?) a guy in the us who did accurizing of those beam balances down to single kernels of propellant. As far as I know he won't touch any recent models...
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