I use USPS but not without problems. I had a clerk with 22yrs. on the job who would not let me mail two long guns from a small satellite post office so I went to main office and mailed them. I had a Postal employee drive to my house next morning, 8 miles, too tell me I couldn't mail these. I contacted post office clarify their policies and was directed to public relations. A number of phone calls back and forth, I was told absolutely no way, as a non FFL holder that I could mail a long gun. I got a total reversal when I emailed lady back and requested their rules stating so.
I would be looking for statements in writing
