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Here's a cheapy and quick way to get the lead out. Use a non-chlorinated brake cleaner. Point the barrel down for it to drain in a well ventilated area. Spray generously until the liquid is running out of the barrel. Have a pre- prepared patch that will go down the barrel as tight as you can force one down it with out sticking. Run the dry patch down the barrel. Watch the lead fall off of the patch. The secret is not the solvent but the cold temp change of dis-similar materials causes the lead to "unstick". The tight patch pushes it off of the steel and out with the patch. But you can't wait to run the patch down the barrel, it has to be right after spraying it. Repeat if necessary but allowing the barrel to warm up to room temp again. It's also a fabulous carbon remover too.
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