MeekandMild,
There are multiple variances in the examples you bring up (manufacturer, age, fatigue, etc) that make it impossible to comment on the specifics of other manufacturers products.
As it relates to the 6.5 Grendel, this is non-issue given the level of material and machining quality being put into the product.
Chrome lining is not currently be done, but that does not perclude it being done at a later date for specific applications.