I am pleased you started this thread.
My brother and I have been �discussing� case charging technique for years.
I shoot many heavy bullet, low velocity loads using fast powder. Many light loads in the 45 Colt and 45-70. I charge cases one at a time with the case mouth facing down in the load tray until I have charged the case.
My brother shoots very few low velocity loads and is comfortable with the technique exhibited by MD in the title picture. That is: holding the tray full of cases up to the charger and running along the rows charging cases. With case filling loads this is a quick method of charging cases.
What technique do you use?
