Using vibration, and compression I was able to get 90 grains of Swiss 1.5 fg with a .032 wad with a bore sized 540 grain paper patch bullet in a 45-70 case. Loads like a torpedo. haha
You wouldn't want to view a picture of my 'vibratory aid for reloading' while drinking coffee. Be all over the screen.
Works deadly though, some black tape and a really small 'Appliance for ladies' taped on to my powder dispenser... almost don't need the powder trickler to fine tune the charges.
Makes sense though, the same reason that you don't get a full of chips. Settling from the vibrations in traveling.
Want get more powder in a given space?
Compression or vibration.
If it looks stupid but works...