On the subject of rifle accuracy, a good point of reference is to look at what's been done/used in serious benchrest competition.
This is the real-world proving ground for all things pertaining to rifle accuracy.
I don't think there's been a serious advancement in rifle accuracy since WWII that did not get the bugs worked out, if not outright originated, in benchrest shooting.
Having said that, the universal response to carbon fiber wrapped barrels in the benchrest community has been, "Heck No"… except without the "Heck" part!
Here's one comment that sums it up:
" A hunnerd bucks and a grape sodey says NEVER will they make any impact in sanctioned BR of any stripe.
In simple fact, the whole idea is stupid. Any engineer, heck any high school kid with an inquiring mind and access to a shop environment can tell you what will be the result of wrapping carbon fiber around a steel bar and applying heat to the bar....."
Really, this comment should come as no surprise.
But, if you have other criteria for wanting one, such as trading off "good enough" accuracy with overall weight, then that's a personal choice.
Some factors that might enter into your decision:
-do you handload?
-if so, are you fastidious in your techniques and record keeping?
-if so, do you systematically and methodically test your results?
If you answered "Yes" to all of these questions, you're probably better off with an all-steel barrel.