Re: round stuck in barrel
Is the bolt handle indexed all the way down as it would be in the shooting position? Or almost all the way up as it would be just before you would manually pull the bolt back to eject the round if it were not stuck?
If the round is live, do not put anything in that barrel. If you are at home, create a makeshift bullet trap with 3 ft. of magazines and newspapers, and whatever you do, keep the barrel pointed at that trap.
It probably should be said that determining seating depth should be done with a dummy round (no primer, no powder), to avoid a very dangerous situation, such as yours if you have a live round in the chamber.