Re: I @$#*&ed UP!
After rereading this thread several times, I begin to appreciate the advice of 308Sako.
Cases and chambers expand under firing pressure. Then they contract back, with the brass springing back almost to original size. The more the pressure, the greater the expansion, the less the springback. Given enough (too much, actually) pressure, the excessive case expansion and insufficient springback results in an oversized case that's really being clamped hard by the contracted chamber. The bolt won't turn because it's being held by the case base with what amounts to a really jammed brake disk.
Per 308Sako, I'd mount he rifle in a padded vise, then hold a block of hardwood against the back end of the bolt, and give the block a couple of sharp raps with a hammer, etc. The goal us to tap the brass forward, to relieve enough of the friction for the bolt to turn.
Once the bolt has turned, if it won't draw rearward, leave the bolt handle in the upward position, insert a cleaning rod through the bore to rest against the inside of the case base. Apply penetrant from both ends, muzzle and breech, wait, and gently tap the rod to get things moving.
If none of this works, the problem needs to be attacked from the barrel end, and unless you know there's no complexities like claw extractors involved, maybe this is best left to a smith.
Greg