I built a very similar rifle for my son. Origin short action, Grayboe Terrain stock, Grayboe bottom metal, Carbon Six Barrel. I used an AI magazine to fit the 6.5 PRC. I also put a Sig Sauer BDX scope on it.
I really like the origin action, but not for this cartridge. The build is rather heavy; it's the heaviest hunting rifle in my safe, and I've never been bothered by 9 or 10 Lb rifles. I blame part of the weight on bottom metal and magazine. (And scope).
If I were to do it over, I would either buy an action cut for the Wyatt's magazine, or go for a longer action. I also don't like the way it ejects. I think the ejection port is slightly small for the fat PRC cartridge.