I had a scale very much like this one. It is OK for checking what your measure is throwing, weighing bullets, but they tend to drift and you need a wind cover as they are very sensetive to wind currants. Do not expect better than about 2-3 tenths grain accuracy from this scale. Fortunately I dropped it one night and now I have a much better scale that does not drift. It is also very accurate as I have compared it to a very expensive lab scale that weighs to 4 decimel places. Mine only goes to 3 but was the same as the lab scale to 3 places. It is a Safeco brand and has both battery and 110 converter power. Had it about 3 months and very happy with it. One reason is that it has a built in wind shield that is hinged. Once it locks in, it does not drift.
Donald