After doing some gun trading, I find that I have several boxes of ammo that I need to sell. I've Googled "shipping ammuniton" and discovered that I need D.O.T. training to ship ammo and a OMR-D label and ship via UPS or FedEx. Can anyone confirm this? If I have to jump through the D.O.T. training hoop, I'm thinking that taking the ammo to the next gun show in my area may be a better alternative.