Cayugad.... Your method of 4 charge grains by volume then weigh average by a scaleseems helpful .I am concerned about my brass reading grains volume . I pour triple 7 3f in a brass till even flat top with 110 grains lock reading screw thendump out at Reddingweight scale .Weight scale says 85.7 grains . Your example 100 grains /volume is close to94.6 grains /weigh that is pretty close. I think my brass reading is no good or 3f itself diffrent kind of grade or both that affect far diffrence between volume/ weigh compasrsion .. it doesnt make any sense to me