".308" as in .308 diameter for reloading, apparently i ommited a proper reloading reference. I reload for everything so i typically think in those terms first before considering purchased ammo. yes, for reloading you can use the plethora of .308 bullets available for a swiss. Indeed the swiss cartridge is "7.5x55"The native cartridge for the K31 is 7.62x55mm. The .308 is 7.62x51mm. Did you mean simply that you can use .308 caliber bullets, or are there some K31 rifles which are chambered in .308? I don't know much about them, which is why I ask.
Yes, not to be mistaken, the 7.5x55 swiss K31 or k11 do NOT take 308WIN cartridges.
... however the K31 reload data is also very similar to 308WIN since the case capacities are very similar (with x55 being slightly larger) as is the pressure rating (NOT the k11 though)