Pretty impressive, although I'd like to see a steel barrel of equal weight/length do the same test. I love carbon fiber in most everything, and one day I'll build a rifle with a CF barrel.
I like the idea of a carbon fiber wrapped barrel but "tough"?, maybe but can't see where one would be as "tough" as steel - on varmint class rounds the bore doesn't last any longer than a CM varmint contour barrel, 2 expensive CA 22-250's taught me that lesson - maybe a 270 or 30.06 would be better, don't know about that