So far I have not tried the grease gun idea but the others are a no go so far.
Will keep trying to get it loose.
May just say the hell with it and unscrew the barrel
Get a can of butane or freeze off (break free type product that chills the target)
Try hitting the cartridge with that with a chemical heat pack around the chamber
(Shrink the cartrige, expand the chamber.)
That's how they set critical bearings...
Thats what i get for not reading all the way to the end...
