There are no extra shipping fees on ammo with UPS. They do not charge a Haz-Mat fee. I have done it a dozen times. I tell them exactly what is in the box. And on the sides of the box I write ORM-D and draw a rectangle around those letters. It cannot be shipped by AIR just UPS GROUND.
The rules are made by D.O.T. and not UPS but UPS follows those rules. http://www.ups.com/content/us/en/res.../firearms.html
SOME UPS stores will not accept ammo to ship. It is best to go to the closest MAIN shipping building for your area.
Our forefathers didn't bury their guns. They buried those that tried to take them.