Per what Old Roper suggested obliquely, a tall drop tube can also make a difference with stick powders. Below are three photos of the same .30-06 case charged with the same charge of 4064 dispensed with no drop tube, then emptied and redispensed with a 4 inch drop tube, then with a 3 foot drop tube. You can see the effect. Spherical powders show very little difference from doing this (one reason they meter consistently), but the sticks respond well. Letting powder enter the case at a slight angle so it tends to swirl is another method.