I had an experience a while back at the local P/O. I was shipping a C & R gun to a 01 FFL , I have a C & R license. I made the mistake of using the name of the shop on the address instead of the licensee’s name. The clerk at the counter asked me if the was a firearm in the package, of course I affirmed that it was one. He informed me that the post Office could not ship it, I pointed out to him that I was federally licensed and the receiver was also, he still would not accept the package. I informed him that I had shipped several firearms in the last few years and that I also received them from the P/O regularly without any problems and requested to speak to his supervisor. His supervisor tried to back him up, I asked to see the P/O regulation that they were basing this upon. After several minutes of scurrying around they came up with what they thought were the correct rules until I pointed out to them that the ruling they were using pertained to handguns. Then she asked if I could show them my license, I pointed out to her that there was nothing in the postal regulations that demanded this. Then they found a reg that stated I would have to affirm that the firearm was not loaded, which I did, then they accepted the package. Probably because the line behind me was getting out the door. Since then I have shipped without any problems, it just depends on the clerk and how his day has been. I did point out to the clerk that if the package had just the receivers name on it that he would have taken it without question; he agreed with me on that.
Jim
