I and many thousands of others have had the same experience at usps and at ups. You can follow the letter of the law and still get refused. You can follow up with the postmaster or a regional manager all you want, Ive never seen or heard a word out of it. As far as I can tell every post office is its own fiefdom that does as it pleases with zero recourse. Same as UPS, if the local manager doesnt want to take it, theres nothing you can do and they dont give two shirts about what the UPS website or the law says.
Thats all a good reason to have and keep a good relationship with your local gun shop.
Thats all a good reason to have and keep a good relationship with your local gun shop.