Deadbolt Cylinder not turning all the way
Normally i insert the key with it facing upward, 12 o'clock position. I then turn it to about 6 o'clock to fully retract the deadbolt. What is happening now is i can turn it to only about 4 o'clock and then the key stops turning. I've tried other key copies but they too dont work.
Is this a problem with the lock cylinder or the deadbolt seriously rubbing against the striker? I've already tried graphite, pushing, pulling, and lifting the door via the handle.
Sadly the door is of a storage location with no other access so i have no way to remove the interior side thumbturn lever. I would appreciate any troubleshooting ideas.