I have never heard of "too clean" cases. I have used no case lube for my 38/357, .44 Spl./Mag., 45 ACP, and 9mm for the last 30 years reloading, with Lee carbide dies. I have reloaded both shiny, virgin looking polished brass, "raw" brass (cleaned with steel wool), and plain old fired brass (? of times). Sometimes a bit of lube on every 10th or so case will make the sizing a bit easier, but not at all necessary.
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