this little scale has served me very well. reads to .02grains. You do need a larger pan with it such as the one that comes with a beam scale. the price is so low I bought a second one as a backup. works well as a check for a beam scale or as a check for a volume measure. I do not weigh each charge unless I am loading rifle (primarily load handgun) so I cant speak for how well it would hold up to high volume use but it is excellent for my purposes.
http://http://www.amazon.com/American-Weigh-Gemini-20-Portable-Milligram/dp/B0012TDNAM