Now we get a clearer picture of the problem. What you have is not a stuck case but "Bolt Lug Setback", a much more serious problem, which will require professional intervention. This is caused by excessive pressure which is sufficient to drive the bolt lugs into the face of their raceways locking everything up tight.
The one time that I saw this was when a guy at the range on the bench next to me actually loaded, chambered and fired a .308 Win round in a .280 Rem. Model 700. Somehow the bullet was able to exit the barrel, but the gun was locked up tight. In his frustrated attempt to remove the bolt, the guy locked the bolt head into a pair of vise grips and proceeded to twist the bolt arm almost completely off the bolt body, and still the bolt lugs held fast to their new home.
Ultimately, the guy, who is an FFL, sent it back to Remington, and they returned it in working order. For sure he got a new bolt, and I suspect that he may have gotten a new receiver as well. I have no idea what this all cost him. Understandably he just didn't want to talk about it.
I would recommend you either return it to the factory, or at least a good rifle builder.