R. Schwartz Say: American Weigh Gemini-20 Portable Milligram Scale - 20 by 0.001 G
Accurate and affordable scale, 2009-12-09
This review is for: American Weigh Gemini-20 Portable Milligram Scale - 20 by 0.001 G
I was hesitant to buy this given the review indicating that there may be a problem with the power supply to this scale. However, I was hoping that the other reviewer's case may have been isolated given the vast number of scales that AWS offered.I've been using mine for about two weeks, making sure to turn it on and weigh the calibration weight at least once a day to check a) the power to the scale, and b) the accuracy of the scale over a period of time checking for consistency.I can say that mine doesn't have an issue with eating away at the batteries and the scale is always within a 3mg error range of the 10g weight (usually less). I would say given the cost, that it is an extremely accurate and affordable scale.

B. Spencer Say: American Weigh Gemini-20 Portable Milligram Scale - 20 by 0.001 G
Great reloading scale - absolute best bang for the buck (bad pun)., 2011-04-29
This review is for: American Weigh Gemini-20 Portable Milligram Scale - 20 by 0.001 G
I bought this scale to speed up my pistol cartridge reloading. I use coarse, large flake powders (Unique & 800X), which don't meter very well through my powder measure. For some loads the starting and never exceed loads are within 0.1gn, so I weigh each charge. The beam balance I have is accurate, but takes way too long to settle down. The other digital scales out there claim to have resolution of ±0.1 grain, but they actually are measuring to 0.01 GRAM, and then convert that measurement to grains. 0.01g = 0.1543gn, so they're not really accurate to a tenth grain.This scale, with its resolution of 0.001 grams (0.01543gn) actually will get you dead on to the tenth grain of powder, as there are 5 increments to each grain measured. I've seen a single flake of powder make this scale register. Best of all, I can use the aluminum powder pan from my beam balance, put it on this scale, hit tare, and now I'm only weighing the powder.As a lot of the other reviews have stated, this unit is very small - the pictures don't accurately depict just how small it is, but on a reloading bench, something with a tiny footprint is a welcome piece of equipment. I haven't had any problem with the timeout, I can weigh every charge and it hasn't shut off yet.The other thing, as others have stated, the actual weighing mechanism is way too recessed into the top face, and there's a lip around it that does make it difficult. Instead of gluing a dime, I just took a rubber faucet washer, and put that directly on the weighing pad, then set my powder pan on top of that. The rubber washer raises it up a good bit (~3/16"), so there's plenty of clearance.I would absolutely recommend this to any reloader that wants accuracy of a beam scale, with the ease and speed of an electronic scale. And you can't beat this price!!!

photo buff Say: American Weigh Gemini-20 Portable Milligram Scale - 20 by 0.001 G
Amazing instrument, amazing price, 2010-10-21
This review is for: American Weigh Gemini-20 Portable Milligram Scale - 20 by 0.001 G
I'm amazed that you get a balance which can display to the nearest milligram for the price that I would expect to pay just for the two calibration weights, which are included. Unless you've had a course in analytical chemistry or work in a lab where precision weighings are routine, here are a few tips. Do keep in mind that it is a precision instrument - use a light touch adding weight to the pan, always use the tweezers -- do not touch the pan or weights with your bare fingers. Keep the balance in a clean environment away from fumes, and only use it on a solid vibration free surface. For precise weightings to the nearest milligram, don't lean on the table, which must be solid, level, and vibration free. This balance is a little gem and an incredible bargain.