What I do is every now and again to be sure like someone has come home in car, opened garage door etc or come down to annoy me put the 50gr weight on, should read 771.6 or something, is written on my workbench shelf. Always seems ok, or just recalibrate it again if you want, takes no time.
I reckon the RCBS has better software, hard to explain but it seems to figure out a few things out. I listen to podcasts, music etc. Just make sure it's on a separate table to workbench/press as loading while it spits it out.
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