I would think when you first got the wood stock it was still partialy in the chamber. Being larger than the bore it allowed the steel rod to move to one side and pass by the wood. Chances are you damaged the throat of the chamber. the only thing I can suggest now is to get a long BRASS rod and go through the muzzel and dislodge the metal rod. some bores are slightly larger at the breach end so once you get it moving it may get progressivly easier. If you do succeed removing it you'll have to have the bore scoped to assess the damage. Some lessons are easy and some are expensive. Hopefully you haven't had an expensive one. I know where there is a barrel of Mauser barreled receivers but I dont the cost of them.
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