As the .30 caliber was about as (un-)popular in central Europe as the 8 mm cal. was in the USA and the British Empire pre-WW2, there were no such cartridges you are looking for. Even the 7.65x53 Belgian-Turkish-Argentinian Mauser was purely an export and military cartridge, unknown here as a sporting number. In your case I would look for a 7 mm barrel and build a correct 7x57/.275 Rigby rifle on that action. The original .275 Rigby rifles used the same intermediate action. If you insist on a .30 caliber, such intermediate actions make nice .308 Winchester rifles. The magazine is too short for most 30-06 loads. The 7.55 Swiss never was a hunting cartridge, even outlawed in Switzerland for other than military and target practice use.