First, make sure your temp is hot enough. Lead should be really silver and almost like water. Skim the junk off regularly; I just use a spoon to quickly skim the surface periodically while I'm pouring and dump it into an old pouring ladle I have, to dispose of later. Make sure to keep the pouring spout at the bottom of the pot perfectly clear; I can tell when I need to clear it because it'll start dripping a little between pours (means there's a piece of debris inside the spout that needs to be dislodged). I just use a piece of wire, inserting it into the opening while pouring a bit of lead right on the surface of the support plate til it runs well--should only take a second or two! Also, make sure there's enough lead in the pot--when I was a rookie, I didn't put enough in alot of the time, and the weight of the liquid lead ensures a good flow. Pre-heat your molds by making a few hook-less pours (just put the lead right back in the pot).

Last--wear leather gloves. I'm not an expert and don't know how others do it, but clearing the spout the way I do it, along with the periodic drips, etc., means the lead will splash when it hits the support plate and the leather will prevent some nasty burns. I just use old handball gloves--not as bulky as leather work gloves.