My thought in this issue is that there are essentially three levels of "pucker factor"
The first is the federal govenment and the regulations in place.
The second is the various states and of course in some cases, their regulations trump the feds.
Finally it is the individual shipping or receiving the weapon. Even though this final level in some cases, makes no sense, has no basis in law, if you can't get a shipper to ship in a reasonable manner, your only recourse is to avoid dealing with them. (Unless you want to get involved in a long and pointless argument, which will eventually go in favor of the person setting the rules.)
I really get impatient when I encounter folks who strive for "zero risk" in a world in which nearly all risk in manageable.
My reading of history convinces me that most bad government results from too much government. Thomas Jefferson