I just made a precision build, so I need to research barrel care for it. But copper won't scratch chrome. Chrome is will scratch copper, as its harder. Also chrome lining is more for a service/duty type application so I'm not babying it.
My 416 SS barrel is another story.
Assumption is the mother of all ****ups.
Know what you know, Know what you don't know. -Paul Pedzolt
"Jack of all trades, master of none, though oftentimes better than master of one" -Mynshul