CHAPBUTLER
If you are looking for a non electronic scale you probably have to go to a re-loaders scale (ammunition) The are expensive but foolproof.
The electronic scale are cheap and do a good job
www.tuffhead.com has one as shown below
US THUNDER SCALE $18.50
The US-Thunder digital scale is a professional digital scale. Weighing in grains (gr), ounces (oz), pennyweight (dwt) and grams(g). Capacity: 500g x 0.1g (7716.18 grains). The US-Thunder comes with a 5 year no questions asked warranty. This scale also has a backlit display, 3" x 3" stainless steel platform, auto off feature and slide out display and control panel. Included are 2 AAA batteries. The US-Thunder is an excellent choice when quality and price matters.