A little story that may...or may not relate to carbon fiber cleaning rods:
For many years, the club that I used to belong to hosted a large black powder shoot, and there was an active local BP club. At some point some BP shooters switched from wood loading rods to the then new fiberglass rods, because the wood rods sometimes broke in use, and the fiberglass ones did not. This went on until they realized that the increased abrasiveness of the fiberglass rods had belled the muzzles of their barrels, at which they switched to something else. This has made me doubtful of the supposed advantages of the carbon fiber cleaning rods, given the similarities of their construction to the fiberglass loading rods. Of course, one of the great things about a hobby is that you get to make your own equipment choices. I have been lucky. I have an old Parker Hale rod that has survived with one small place where the coating is missing, a Dewey coated rod that has its coating intact, and has lasted so long that it has been refitted with the newer handle with better bearings that they now have, a Bore Tech set that has one small spot where the coating has failed, and a couple of other brands that are in good order. I take pains with the use of rods, paying close attention as I stroke them in barrels, and wipe them off each time they are removed from a barrel. This is in contrast to how I see many shooters use theirs, where rapid thrashing back and forth, with a great deal of handle position induced bowing is more the norm. I am sure that gunsmiths and barrel makers are comforted by these habits, since they tend to reduce barrels accurate service lives.