Depending on who does the shipping, costs can be quite different over similar distances. Two different dealers, both shipping about 1800 km, shipped with very different shipping charges only two months apart. The price of the ammo at each was exactly the same.
One shipped two cases at $103, a very reasonable charge. The other shipped one case at $228.95 plus an additional shipping tax of $29.26 for a total of $$258.21. They used different shipping companies that they chose.
I paid the extra only because the dealer using more expensive shipping had a particular lot of Midas + not available anywhere else. I bought six bricks of it along with some CX. The difference between shipping six bricks and ten was negligible.