Edgecrusher, yes, I shoot right next to the sea or off boats and there is salt water spray.
Farkle, that's not the case with many "precision" 308 barrels I've seen come to market of late. Besides, I was referring to the list at the beginning of this thread. All of the barrels listed there as nitrided are Stainless Steel (typically 416). All the CM barrels he listed are chrome lined, not nitrided.