Most compressed loads are just powder that is too high in the case to let the bullet seat without pushing some down. You can use a drop tube, or find some way if you think you are crushing too many pellets. It is not like the old black powder loads that had to be packed. The stick powders are worse for that, ball fills and meters very nicely. A bigger case uses more powder, and there are still some that will compress. The advantage is no loose powder to give inconsistent ignition depending on how it lays in the case.
