With wheel weights and linotype and many other sources of lead drying up, I ran across these at the local power company where I work: Insulating Pins.png
These are insulator pins. Those Coke bottled color glass or ceramic insulators screw on to the lead threads. Most are sorted out and thrown away as junk, not scrap, since they are mixed metal. The lead melts right off.
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I will put up some pictures of a no sweat process of melting the lead off the pins, and both elements after separation. I went out to look for a "processed pin" during lunch, but I think they were already hauled off to the junkyard.
The easiest and cheapest way to melt the lead off is to use my wife's circular fire pit. It is rounded and has drain holes in the bottom, so I put the pins in a wagon wheel spoke design and then build a fire on top. The lead melts and runs downhill to the drain holes and is collected in a steel broiler pan. First Layer.JPG
Lead stalagmites.jpg

The end result are these lead stalagmites that are caught on the pan below the fire pit. I weighed the result of melting the lead threads off 37 insulating pins and it came to 12.7 pounds. Plus, I haul the scrap steel off to the junkyard for a bit of money to put towards molds.

I know this lead source might not be common, but if one or two casters run into a pile of these or can go negotiate for them, then this thread has served its purpose.
The bigger ones carry quite a bit more weight. I was a little surprised myself, but I guess that is why it's a good idea to put a scale to it. In fact, I am going to double check it.................okay, I got 12 lbs. 4 oz this time. I also did a fingernail scratch and it looks fairly close to pure lead, or at least softer than wheel weight lead.
If a guy was to sharpen the remaining threaded end on those, they could be used for foot pegs/steps to a deer stand. With the shoulder on them you could pull them back out with a crow bar if need be.