Get something solvent-like soaking in to attack the wolf polymer (or lacquer) coating, whatever you have that is safe for the bore. Then after a while get a rigid rod in the muzzle and repeatedly tap, not driving railroad spikes, but just tap. A whole lot of little taps, just lean it up against the sofa and tap while watching TV.

I do have one of those extractor thingys too, but won't be back in the springs until late friday.