How do I legally transport a LONG GUN?
From Calguns Foundation Wiki
Calguns Foundation FAQ: How do I legally transport a LONG GUN?
Simple answers for simple questions
Link to discussion thread
Unloaded, cased or not, visible or not.
It is convenient to have a case; that is not required.
It is less obvious to transport a long gun in a vehicle trunk; that is not required.
When traveling through Gun Free School Zones Federal law requires long guns to be in a locked container or a locked gun rack.
See also
Transporting a Firearm and NRA's Guide to the Interstate Transportation of Firearms