Re: Barrel Sleeving/ Wrapping
I have two rifles (FN PBR .308 & Armalite AR-50) that have had the teludyne strait jacket installed. I have to say that the difference is significant. In essence, the SJ system "wicks" heat away from the bore and dissipates it much more rapidly. There is no mirage on the 50 and the .308 seems to be less particular in regards to what I feed it. After 15 rounds through the 50 in a span of 90 seconds or so, I can pull the bolt and put my finger in the chamber. Feels the same as ambient temperature. The .308 will group well (if I'm having a good day myself) with winchester white box ammo. It still shoots the hand loads better, but for general practice, the cheap stuff shoots good enough to make me smile.
(BTW, the TTI muzzle brakes are good too.)