Ok, so I have a question, that I may learn is quite stupid. I don't think it needs it's own thread. What is the legality concerning public transit? Could you, in theory, take a bus to and from a range? Obviously this is a terrible idea, as if anyone learns you have a gun, you're going to get yourself in quite a bit of trouble, regardless of legality. Also, what about interstate travel on something like a Greyhound? I know the busline itself prohibits the transportation of firearms, and you'd be kicked off the bus, but would it be illegal? And what about ammunition? I ask out of curiosity, for obvious reasons this isn't something I feel anyone should try to test. Even if it's 100% legal, it's 100% a bad idea.
If it is a common or contract carrier and travelling accross state lines, the fed law says you must tell them about it and give it to the driver.
If it is intrastate travel and not interstate, then this may not be a requirement, but I am not 100% sure.
If it is an antique and no ammunition, as I understand it the requirement to notify even when travelling interstate is not in effect.
As far as public transportation not crossing state lines I tried to find this answer and I found very little. However there are some people who have stated they carried gun cases on MARC trains before and even though WMATA has a general prohibition on weapons on the subway and their busses, someone asked by letter about people with VA recognized gun permits and they begrudginly seemed to say it is ok in VA.
Now in DC when they lost the Heller case I asked how would people get to the main police station to register their guns if the only way to get there was by train and bus. The response I got was as long as it was unloaded and properly cased the MPD did not care.....but I got the impression that it is an WMATA police problem and not theirs so they don't care either way.
I will try and look for this answer again, it has been a few years since I last tried to find the answer and maybe there is more to be found on the internet now.