Ammo can only be shipped by common carrier like UPS ground. Ammo, primers and powder can't be shipped by USPS. UPS will require it to be marked ORM-D and small arms ammunition in a heavy carton, it also needs to be shipped at a UPS Customer Center or Hub, they're not supposed to accept firearms or ammo at UPS stores. For cost, I shipped 60 some rounds of .357Max ammo to one of the members here on the east coast, cost was $13+.
Tim