Thank you all for your replies.
I just checked my 12 year old Dillion beam scale and RCBS Electronic scale against my father's $3,500 electronic scale (accurate to +/- 0.0005 grams). Both of my scales were reading 0.0 - 0.2 grains more than my fathers scale (checks weights were 1 grain, 5 grains, 10 grains, 20 grains and 50 grains) with more differences at higher weight.
Also checked my friend's cheap Lee scale and that thing was waaaay off. 5 grain check weight read 4.5 grains and 10 grain checked weight read 9.2 grains. Scarry to think that he was using that piece of crap to weigh his charges.
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