Down day reloading...
As per

's recommendations, I mounted my Uniflow onto an RCBS base on top of a 16"x16" piece of furniture grade plywood from my scrap pile.
I then primed 50 .223 cases and like

said, just held them under the drop tube, right in the tray, charging them one by one.
Then I seated bullets in the Challenger press.
Gotta say, reloading .223 and presumably .308 just turned from a chore to a pleasure. No more weighing out each charge and trickling. No more touching each case while charging. The Uniflow is dropping with +/- .1gr accuracy. Enough for my needs.