I think it mostly comes down to a personal preference. I've had a couple and they're cool looking for sure. The proof Sendero was stupid accurate which is something I typically hear about it.
They do offer a larger shoulder diameter for brakes and cans vs steel of equal weight.
I don't buy the cooling thing, it's a gimmick IMO as is fluting when it comes to cooling on steel. IMO, the CF is an insulator and that heat has to go somewhere. You have a paper thin steel barrel with the chamber and muzzle being heat sinks.
I've heard CF is typically slower than steel but I can't confirm this.
I've been using a barrel for a year or so from APR that has some really deep flutes. He claims a Bart Sendero is just a little heavier than a CF Sendero in the same length. I like it so much I had him do another with a Muller which is about .025 bigger in diameter than the Bart Sendero.
This rig as shown is 10.1 lbs, 22 inch barrel and Ti brake, Def classic, Manner Pro hunter, bipod and a M5 5-25.
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