I use Ballistol and have been satisfied. However, this thread got me wondering about Kroil ("the oil that creeps") for the interior of damascus barrels. I like the idea (creeping) in theory, but I don't know how you can really quantify if it is better than Ballistol (or anything else) without sectioning the metal. Hmmmm.....might be an interesting experiment for someone with old, useless damascus barrels???

Phil