RE: The powder measurer experiment...
While I do not weigh my powder charges, I have done it. I just do not see the point, although to be honest, if I were going hunting where shots were 200 yards, I actually might take the time to weigh them out. The way I look at it, anything I can do to that projectile to make all things as equal as possible, might pay off in along range accuracy difference.
Also remember when you change powder containers, going to a new pound, you need to re-measure and find the average for that pound as well. It's like starting new.