Quoted:
None of the high end national match guys use chrome bore/chamber... All use SS barrels.
Does it make a difference, Yes. The question is, How much?
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Very true - but when you get up to the level of being a "high end national match guy" you start doing things like using obscenely expensive custom barrels, handloading your own ammo by trickling powder to less than a tenth of a grain under 69 gr. moly coated bullets seated just a few thousandths of an inch off the rifling for that particular barrel, and stuff like how your glove fits and in what order you tighten the straps on your shooting jacket make real differences in your score. In that rarified atmosphere, I'm sure a case could be made for changes in group size whether you're wearing your underwear with the label facing in or out. [:P]
Chrome-lined barrels, OTOH, function well with a wide variety of cheap and surplus ammo, and are still accurate enough that with my Colt-barreled M4gery I can hit the serving-tray-sized gong off-hand at 600 yards with iron sights 6 out of 10 times.
So my advice is - unless you have at least one of everything in the [url=http://www.creedmoorsports.com/]Creedmore Catalog[/url], stick with chrome. [:D]