Reading between the lines of the original post, I think you must weigh each charge?
As an alternative to pre-measuring charges for later use, you could use an electronic powder measure that weighs out each charge, trickles it up to weight and beeps when it is right on. Pre-measuring weighed charges into individual containers is not going to be much faster when you consider that you will have to open and handle each one.
But there is a school of thought that says measuring charges by volume is superior to measuring by weight.
Have a look at this thread
Effects of Tiny Variations
http://forums.accuratereloading.com/...2918#924102918
There is another thread (for which I do not have the address anymore, sorry) that described a manufacturer (rifles, ammo or powder, I don't remember) that put on a class. Part of the class had this challenge. A number of rounds were loaded with weighed charges and a like number of rounds were loaded with charges thrown by volume alone. The volume charged cases were consitently more accurate on the target than the weighed charges.
Theory says the weighed charges should be more accurate, but empirical testing shows otherwise. If anyone can explain it, I would love to know how the theory and the experience can be reconciled.
Of course, one could go the extra mile and dole out a bunch of charges by volume and then discard all charges that did not come in at some particular weight. That would eliminate the question of weight vs volume.
Eliminating that question would, I think, give direction to the O.P.'s question.
Lost Sheep