I currently have a Ruger M77 Mark II chambered in .280. Is it possible to convert this over to a .338 WM? The reason for this is I like the gun, but I would rather have a .280 AI in a Rem 700 than in my Ruger. I want a .338 that is comfortable to carry, and this gun fits the bill. Besides opening up the face of the bolt, what other mods would have to be made?