I have used a single burner electric to melt lead in small quanities. Really need smaller size cast iron pot and not load it to heavy. Use ladel for pouring. For the price of propane bottles get you a Lee melting pot and be done with it. For large weights you need one of those propane burners used for frying turkeys and fish with a large pot to melt and pour that larger quanity of lead. Plus you can use it to flux large quanities of lead at one time. For those large weights I'd just gather up wheel weights and use that and save good lead for smaller jigs.