Just send it in a Postal Priority box and write “ORM-D” on it. You are not “the shipper” according to DOT regulations and bear no responsibility for its packing or certification. Even the questions they ask you won’t stand up in a court of law unless you have been trained or certified.
Sounds like advise from a 'barracks lawyer'. Let us know how that works out for you the next time you send ammo via USPS.
