There are 2 schools of thought on this...
Weighing the charge or using volume, such as a powder measure. Clint Smith did a test on this with a .308 and found that volume from a powder measure to be as accurate in any hunting application.
I have done the same thing for years and can hit anything I want with any gun I have and don't need a powder trickler at all. I even use a Dillon 650 for loading my 6mm PPC.
I figured that more people would pay attention to what a known shooter/writer would say, but I have had great success over the years with measured charges. I have a trickler I use for load testing, once the load is found the volume method will work every bit as well.
A GOOD powder measure like a Redding will load ammo that will group at 100yd just as accurately (all other varibles equal) as weighed charges. You most likely will see lower standard deviations in velocity with the weighed charges, this will help to minimize vertical stringing at long range. If you are loading for shots past 400yd, weigh the charges, and do a ladder test.
