I wanted about 6.2 grains of Unique in a 45 ACP case for a 230 grain JRN. Lee's data say that disc .66 will throw close to that volume of Unique. I had to go all the way to disc .82 to throw 6.0 grains, a 24% increase in volume to obtain close to the desired charge weight. I double and triple checked the weight on 2 very accurate scales and they both weighed within .1 grains of each other. Could there be a 24 % difference in Unique's volume from lot to lot?