An article about sending shipping guns reminded me of something that happened a few years back to me. I had cast up some bullets and was going to send a box of them to a friend to try out in his reloads. I was using an old Styrofoam cartridge box so that the bullets would be in perfect shape when they arrived. These were 550 gr cast rifle bullets so they fit perfect in the old 45 acp box.
When I go to the desk to purchase the postage the Postmaster lady asked me if they were bullets. When I replied yes she schooled me on how it was illegal to ship bullets through the Post Office. I told her that her carriers had delivered many thousands of bullets to my home over the years with no problem. I then told her that the restrictions only apply to loaded ammunition and not the components such as the bullet. She could not understand the difference between a bullet and loaded ammunition.
Next time I shipped bullets I packaged them differently and was ready to lie if need be. Sometimes they need to illustrate the manuals these folks read. Maybe a picture of a bullet and a picture of loaded ammunition.