Jason Hairston, owner of Kuiu, just used this rifle for his BC stone step hunt. Kudu ran a video about this rifle. I found it interesting that it is referred to as the "ultimate" sheep rifle and I was surprised at the choice of a 20" barrel. I'm not the most knowledgeable gun guy, but it seems you would leave a lot of the 6.5 CM performance on the table with that length barrel. I like the 6.5 Creedmoor and recently bought one but I don't know that I would consider it the "ultimate" for sheep.
The rifle I have hunted with the past 10 years is somewhat similar, it's a Christensen Arms, with a carbon fiber wrapped barrel, Remington titanium short action, 24" barrel, titanium muzzle brake, carbon fiber stock. That is nearly the same configuration but with 4 more inches of barrel length. I have never weighted the rifle sans scope and mounts but it was 6.5 pounds when scoped with a 4.5X14 Leupold. It has to be right where this Remington is weight wise. My thoughts are as long as you are in sheep country, most of which is grizzly country, carrying basically an identically configured rifle, why not carry a short magnum. Mine is a 300 WSM at basically the same weight. Had I build it today, it would have likely been a 7mm short magnum for a bit better BC performance. With the break, both my wife and daughter hunt with it and shoot it vey well. Just my thoughts.