I personally would go 30-06 since up here in Northern Ontario its the most common cal. with 300win close to it. When I was in Sweden they often used the 6.5x55 as they were familiar and you have to pass a bullet placement test before you can get a license. I personally have killed Moose with my 1903 Mannlicher in 6.5x54 and 160gr bullets. best of luck and SKALL!