The DRACOS barrel is for Armalite Rifle style platforms.
The Teludyne Straight Jacket is for bolt action. Build the rifle as you want it, send the barreled action to them.
I am very serious about sending my xxx-Hubel Express barreled action to them.
http://www.teludynetech.com/
I went to their web site, by clicking the link. Once there I found another link titled "Endorsed by the experts". In that discussion, I read a sentence that stated "While the exterior of the barrel may eventually get hot, the interior does not".
That sentence is nonsense. The heat is applied to the interior. The interior will always be a higher temp than the exterior. They might want to find more expert experts. I went to their web site with an open mind, seeking their explanation of the science. They struck out with that statement.