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Denton has done tests of various scales, both in a constant temp and changing temp. His results (surprisingly) showed that the Lee Perfect scale is the most accurate across the board!
That said, if you follow the directions and keep your digital in a constant temp area, warm it up and calibrate it, it's as accurate as you need.
I have a single, marked 55-gr match bullet that I've used as a scale check weight for 40 years. It doesn't matter to me if it actually weighs 55 grains or 54.8 or 55.2, as long as everything I calibrate with it says that it weighs 55 grains.
If you work up a load for a given rifle, it really doesn't matter if the actual charge weight is spot on, as long as it's "spot off" the same way every time.
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