For weighing individual powder charges, it's hard to beat a beam scale for simple, consistent reliability. I started with a 505 and used it for more than a decade. Decided I ought to modernize and got a Dillon digital scale, which was just peachy for a year or two - as long as I turned it on and let it warm up for a while before use. But after a while it started to drift pretty quickly after a zero, and finally I just gave up on it.
Research seemed to indicate that any of the commonly offered digital reloading scales were not likely to offer long term accuracy and stability. Since I didn't want to spend a grand on a powder scale, I went back to the 505 beam.
When I decided I ought to have a backup beam scale, just in case, research suggested that the Lyman M5 was among the most accurate. Found one on ebay, and that's what I use now. VERY sensitive (1 granule of Varget moves the needle). And I have adapted to the 2-poise system it uses. If I had it to do over, I'd get another one.
If I did bullet sorting by weight, there's no doubt that a digital scale is the way to go, and I'd have one of the usual, affordable, models for that purpose. But for powder work, whether setting a measure or trickling up individual long range rifle rounds for a match, I'd take a beam scale any day.