Lee pot, what drips??¿¿
If you're talking about the ten pound production pot, yeah, that's the fabled drip-O-matic. Not much you can do with it, but live with it.
Both of my pro-20's are drip-less.
BUT I modified both by putting more weight on the valve bracket. I took a piece of 1.5 inch dowel I had around, drilled a 7/8" hole in it nearly all the way though a 3" chunk of it. This hole I filled with lead, it smoked a bit but ended up being a lot heavier than the tiny wood knob it came with. Drilled and threaded the lead for the screw on the bracket, viola, no dripppps. (It didn't drip to start with, but I like the more positive feel of the extra weight.)
As for ladle or bottom pour, I do both. Depending on what mold I'm using and how big the boolit.
Ladle pouring breaks down into 2 different methods. Pouring with a stream of lead from a lip or bottom pour ladle,(flooding the sprue plate) or contact/pressure pouring. Refine that by holding the mold sideways,(at 90 degrees) to mate up with the nipple on a Lyman or Rowel ladle, then turning both to vertical. Then separating the ladle from the sprue plate to form a sprue puddle. Second method is to hold the mold in pouring position, then tipping the ladle to upright while hitting the sprue taper. I'm not coordinated enough to do that!
Some molds can't be used with the flooding ladle method. Like the excellent Mihec cramer style molds from Slovenia. The intricate guide pins on the side of the mold would get flooded with lead every time. You'd never get the boolits out of the mold!