Like I said above, I tried a different stock barrel and it solved the problem. This would tell me that it's that barrel (right?).
I called Glock and of course the only thing I could get out of them was, "send the gun in to us..."
Anyway, whether it's the lock up, the crown, ammo, the economy, or el Nino, I need the gun to shoot matches. :) I ordered a new barrel and will send the old one off to Glock. If nothing comes from that because I didn't send the whole gun in, well I'll say a few curses on Glock QC and move on.
Thanks for the help here guys.