[Hugh]

"Also picked up the ideas of using a solvent like perhaps Kroil on the threads before removal attempts. Some time in the freezer as suggested before is good too I think. The Luger receiver and barrel as you know are kinda dainty really, sometimes a sharp hammer blow on the action wrench is worth more than an average sized guy jumping on the end of a 2 foot wrench."

DITTO what Rick said.

I had one bbl that twisted until the front sight was pointing DOWN before it broke loose with a loud "crack"! Often those guns that have been reblued with the "modern" dip blue have the threads rusted in.

I have found that overnight soaking in Kroil or Liquid Wrench helps loosen bbls, also , for really stubborn ones, heating the receiver area with a propane torch & then putting in the freezer overnight will help.