I have already been hassled by TSA for trying to bring only 300 rounds or so of 9MM with me. When I pointe dout that the airline regulations allowed for so many pounds of ammunition the TSA guy told me he was in charge. I then went to the GSC (Ground Security Coordinator) and showed her the regs that I conveniently had on my person in printed form, and she took care of it. What befuddled me the most weas that I wa son official business, flying on a Secret Service detail, or maybe it was an Air Marshal detail that I was on something like that. They still hassled me over their own made up, on the spot and at the moment, rules.
Do yourself a favor, copy the TSA rules, copy the airline rules, and stuff those copies in your pants' pocket. Be polite if hassled. if not resolved, ask for the GSC.
All the best,
Glenn B