With Varget and other stick powders for that matter is find a technique that works for you and do it the same every time.
I have a baffle in each of my drum style powder measures, I throw 20 or so charges before even measuring a charge to settle the powder column, and I cycle the powder measure in a way to get the minimum of vibration. Also, my powder measure is mounted to a different platform as the press so little or no vibrations from the press get into the powder measure.
Others like to knock the measure at the top and bottom of the stoke, others do not like powder baffles, some tape a vibrator to the powder measure, some make sure the powder column never goes below certain level, and the list goes on.
The point is, find the technique that works for you.