POI shift from heat is as close to non existent as I have ever seen in a barrel. Even a 1.20" straight bull barrel will heat deflect if you run a large number of rounds through it. I built the very first Proof CFW barrel in Canada into a 300 Norma mag, 90 grains of powder pushing a 230 gr bullet at 3200 FPS. Proof gave us the barrel so abusing it was a no brainer seeing as my total investment was some labor and components. We purposefully ran 50 rounds through the rifle in under 10 minutes, so fairly rapidly. POI did not change but we could have cooked dinner off of the barrel. They cool down very fast we learned as well.
All of us here at the shop are sold on them.
Alberta Tactical Rifle Supply
Canada's Premier Precision Rifle Manufacturer
Please email all inquiries to info@albertatacticalrifle.com NOT through PMs
The Province of Alberta has been suffering for the last 30 plus years with an EAST infection
http://www.albertatacticalrifle.com/
Long Distance is BETTER than being there
Alberta Tactical Rifle Supply
Canada's Premier Precision Rifle Manufacturer
Please email all inquiries to info@albertatacticalrifle.com NOT through PMs
The Province of Alberta has been suffering for the last 30 plus years with an EAST infection
http://www.albertatacticalrifle.com/
Long Distance is BETTER than being there
Please update with your progress. I like the idea of a carbon sleeved / wrapped barrel so I'm curious.
I was drawn initially to the BSF barrels as their philosophy seems good (using vented carbon fibre as a sleeve to keep the barrel under tension) but Ive read mixed reviews on them, and more troubling is the recent reports that some are failing (one failed on the first shot apparently). From what I can tell this seems to only affect their fluted barrels which may be indicative that they simply removed too much material.
My MS build will be for 3 gun but I see it as a do-it-all rifle and a good barrel will be key.