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I'm sure they might be selling them, but,whatdo they resolve at.1grains, which is marginally useful, or better and affordable .02, or best and unaffordable .01 grains [.001 grams], which you wouldwant to better discriminate between different weights of pellets in the same container.
I have never seen one 1 grain out... they are very seldom more than [+-].5 grain or more out, especially the smaller, lighter ones, so you need a finer scale for meaningful work.
Mine was a great deal for 10 grams [155 grains]capacity at .02 grain resolution.
The full stats on this scale you mentioned would show whether it was useful for things as light as .177 - .22 airgun pellets.