Maybe if brother Jensen,could establish a round count relative to the wear on the carrier and bolt.That would be critical information.I might suggest the chrome lining would be harder than the bolt,but then the use of stainless wire <dontknow> stainless is a hard alloy also. <dontknow> Great thread.Also if you are wiping the bolt with CLP or something of that type the lube I would think might mitigate wear to some degree.That is just MHO from a mechanical view. <dontknow> <munch>