I've shipped handloaded turkey shells via UPS at the hub to a buddy once and the intake person couldn't understand that they weren't factory ammo. She demanded to know the brand of ammo. I finally gave her the name of the hulls and that seemed to satisfy her. I don't know what the penalty would be for shipping in the US mail, but I treasure my right to hunt and bear arms more than I do saving a buck or two and don't want to discover the penalty from the blind side. Gil