Carbon fibre tube on barrel

[SHORT SHELL]

I had previously attached a carbon fibre stretch sock with resin on a powder burner to help harmonics which helped. As I had a carbon fibre tube of the same dimension as my Texan barrel I decided to attach it to see if it helps its harmonics as I have seen a slow motion .458 Texan barrel whip video. To see if it helps I will try it bare then epoxy it later. I have read that attaching a muzzle brake makes a difference but I want to try this method first. Has anyone got better groups with carbon fibre resin coated or not or a muzzle break?

[rsterne]

This is a common method for increasing the stiffness of airgun barrels.... Here is a photo of my .257 Condor barrel sleeved with a 26mm OD carbon sleeve over the 16mm barrel, compared to the original .22 caliber barrel below it....

https://hosting.photobucket.com/albums/oo221/rsterne/257%20Condor/.highres/Condor%20Barrels_zps0gatbegj.jpg?width=1920&height=1080&fit=bounds (https://app.photobucket.com/u/rsterne/a/47e225fe-debc-45b3-b424-216ee17f5a07/p/34906cb3-da9e-4e59-b35c-2446620be6d2)

The carbon sleeve is turned down and inserted into the rear collar for about half its (increased) length.... The barrel in increased in stiffness about 7 times....

Bob