I do have a digital scale so weighing is no problem. So Semi I know you are one who weighs as you sent me some pre-weighed.
Now let me pose this question: Say you sorted your cast balls from 284 grains to 288 grains in the manner you do. Do you see a significant POI from balls weighing 284 gr to ones weighing 288 grains?
I can see sorting for a consistant weight to determine what the optimum charge for your ML would be to eliminate any POI difference due to ball weight. But once the ideal charge is determined, does ball weight difference of 4 or 5 grains make a difference under normal hunting situations?