5,760 grains in troy weight or 7,000 grains in avoirdupois weight
[DOC] [TLE] Grain Precious Metal Weight - Tax Free Gold [PAR] The grain is the smallest unit of weight in the avoirdupois, troy, and ... 5760 grains 
= 1 troy pound; 437.5 grains = 1 ounce avoirdupois; 7000 grains = 1 pound... [DOC] [TLE] Grain Conversion [PAR] perform conversions between grain and other weight and mass units.