Kroil is what I used after other cleaners seemed to have cleaned the barrel. Lead slivers came out. It was a ton of work - it is in a les bear 45acp that is a 1.5" match fit. The thing was amazing until I started loading the lead. Accuracy remained good. But I don't want to work so long or damage the barrel (early)
I ordered the Lewis lead remover.. But it should be so hard to clean.
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Jt