...that their rifles could be dry-fired without damage. Since then they've changed their recommendations, but I still suspect that a single dry-fire wouldn't hurt it. BTW - if you DO try to shoot it out, make sure you still point it in a safe direction. I once shot a wad of paper-towel through a B4-2, and it was going fast enough to embed itself into a cardboard box a couple of inches from the muzzle!
You could also disassemble the rifle and push it out from the other direction. It sounds like the skewer wedged everything in there, a good poke from the other direction might dislodge it.
Then again, you might be able to accomplish the same thing with some flexible copper wire (somewhere in the 10-14ga range) or some thick plumbing solder and work it through the loading port. IF YOU TRY THIS - don't cock the rifle! Just pull the cocking lever back a bit, rotate the port open, and then let the lever come back to its rest position.