Using Vibration to Settle Black Powder

[Kurt]

I have drop tubes that range from 4" too 36". The one I use is 12" and it is made from 3/8" OD (not ID)copper tubing with a funnel that has a 3/16" opening glued into the flared tube and it has a 3/8" od X 1/2" ID reducer to fit over the case mouth. I can slow feed it or dump the powder in the funnel and it's like trickling the powder when it's empties. I found very lightly tapping the tube making sure all powder is in the case will raise the powder in the case