Casting along, using wheel weights we smelted earlier today. Nice clean ingots put into RCBS casting furnace. Molten lead running well, casting good bullets, when suddenly the lead starts to run slowly, then drip, then almost stop. Furnace set at 725° F. Tried lower and higher settings to no avail.
Wot the heck went wrong??? I now have a casting furnace half full of lead that won't run out the bottom.