Quote Originally Posted by Tom Freeman
Turn the muzzle up. Pour a bunch (a spoonfull or two) of acetone or Kroil in there and let it soak. Get a solid brass rod, about 20 caliber. Use it for a punch.

Most likely the laquer coating has glued the case to the chamber walls.

Then, never buy wolf or any coated ammo again.
brake or carb cleaner will also break down the coating. Let it sit there for a little. and then tap it out with a solid rod. This is the same problem i had with a bolt rifle a couple years ago and it even had a nato spec chamber on it, that coated ammo is bad ju ju. At the time it happened to me, and after breaking a GI cleaning rod, I went to lowes and bought a brass dowel rod. they sell alum and brass rods you could probably use either or, take a pair of calipers with you so you get one that will fit. Cut it so its only a couple inches longer than your barrel. I poured a bit of marvins mystry oil down the barrel and let it sit for a couple of hours. It came out without to much issue after that, but still was a PITA.
That reason alone is why i dont buy steel ammo for any of my 5.56/.223 guns. I will run it through my AK's with no issue but none of my AR's any more. Its the only issue i have ever had with it but that was enough.