Most English flasks by Dixon ,Hawksley , Frith and other Sheffield flask makers used the dram measure it all depends for which weapon a flask was needed if it was a small pistol it may be a be a half dram if it was a fowling piece it would have been a large flask capable of 5 to 8 drams .You did find that on the Continental flasks these were in both grains and drams . One drams measures 27.34 grains has Mr McKenzie said
Feltwad