Ship it through UPS and them only. Print out the following label and tape it to two sides of the cardboard box that you plan to ship the ammo in. Make sure that the ammo is secure (doesn't rattle and is a good container) and put that container in a cardboard box. Then go to a UPS center, not a UPS store or drop off place. If they give you any problems, tell them to call their UPS Hazmat number and confirm that you are following their directions for shipping ammo.
This is what I did and didn't have any problems. You can go to
http://cartridgecollectors.org/shipping.htmfor more info.
Shipping ammo
