Bob,
What I would have done originally was take a propane torch and heat it hot around the nozzel, then take whatever was inside out, with a pair of forceps or needle nose pliers. I don't know the status of the pot now, but if you drilled a hole in the nozzle, you trashed your pot in my opinion. Guys do this all the time, to make the lead come out better. You can do this but you have to go with small drill bits first. The problem with that is , if you make the hole too big, the plunger will not seat correctly and now the lead will always drip if not come out at a flow. My suggestion is send it back to Lee, and they will fix it for half the cost. I am going to say it will be about $10-$20 to fix. They will replace the tub (the nozzle is fused into the tub) and the plunger with a new one. At this point I think you have done enough damage, not to sound like a smart a$$. I don't think you will be able to fix it in perfect working order again. JMHO.