Chrome lining is nice, but even makers like Rock River Arms doesnt do it unless you want it, and pay 30.00 more when you order it. They will tell you
they prefer not to chrome target barrels, as they are slightly less accurate
than the non chrome.
Most sporting rifles don't have it to this day, and U.S. Military rifles didnt have it till the M16E1....in response to the corrosion problems of south east asia(and lack of proper cleaning kits at first)
So its really not an issue one way or another unless you plan to neglect your rifle in a tropical inviroment...otherwise its a preference. Now rifles that shoot
corrosive commie ammo...same thing, if you clean it properly it will never see a pit, frost, dark bore ect...neglect it and it will grow hair lol.
Steel cases are not an issue that calls for chrome to counteract...there were U.S. issue steel cased .30 carbine and .45acp in WW2 for example.