the purpose of chrome lining is durability under sustained full auto fire. basically it takes a lot longer to erode a chrome lined chamber and bore. most people arent going to shoot enough to warrant the extra expense.
there is a recent benefit as well. chrome lined chambers allow easy use of steel cased ammunition. most steel ammo has a lacquer layer which under heat will melt and bind to a non-chrome chamber causing fail to extract issues. line it with chrome and the lacquer wont stick.
so if your shooting full auto or 5000+ a year or more or are using steel cased ammo you might want chromed linings.
chrome also makes it easier to clean. cheap chrome linings arent as accurate as untreated barrels. the cheaper chroming proccesses dont leave an even layer. what sort of chrome lining spike's uses i dont know.
"Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." — L. Neil Smith
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