Pump the rounds through your so called fast cooling carbon barrel and burn out the steel liner in no time.... at three times the replacement cost? no thanks
I would only consider it for something like a 308 that has long barrel life
If CF does cool faster, it ought to show up as at least marginally better barrel life. It's heat that kills barrels.
If you research Springfield's Waypoint with a carbon fiber barrel they claim to flute the steel barrel under the carbon fiber to assist dissipating the heat, that suggest the carbon fiber traps the heat.
Feeling the outside surface and it being cool leads me to believe it does indeed trap the heat
