I know this is not rocket science so maybe my scale is defective or I'm just doing something wrong. Here is what the kit came with. It has a silver tray, copper colored try, and a weight that does not indicate what weight it is??? So I put on he copper colored tray per instructions and have both slides on zero. Now this should read zero on flat ground unless I'm missing something? WEll it doesn't? Now what I can say is I think the scale might be ok because if I weight out the copper tray plus a 55gr winchester 223 bullet and subtract the tray weight it is dead nuts on 55gr? So can someone tell me what I'm doing wrong? Also how much of a difference in grains can I expect to see between bullets in a batch? Say I have 1000 winchester 9mm 115gr what is the range in grains? Thanks