As others have mentioned, Chrome Lining and accuracy are inversely related. Chrome lining is meant for "throw in the mud and pick it up," and do not worry about corrosion. When I think about chrome lining, LMT comes to mind. They make some nice 7.62mm barrels that are chrome lined and good shooters in their MWS platform. I think they also offer a 6.5 CM with chrome lining. For their sharp shooter / sniper guns, they use stainless. KAC uses stainless and chrome-moly-vanadium, but not chrome-lined.
We are just starting to sell the Scar 20s in 6.5 CM. I do not recall if that is chrome lined. It might be.
Most people consider the 6.5 CM as an increased accuracy and distance shot replacement for the 7.62mm NATO, so you are not going to find many chrome-lined 6.5 CM.
Make sense ?