Although I own and shoot a Norwegian Krag, I've never put a single round of commercial ammunition through it - strictly handloads and the excellent Swedish M41 military ammo.

I'd guess from your post that you believe the 6.5 Norwegian Krag requires different ammo than the Swedish Mauser. This is simply not true. The cartridge and both rifles were designed for ammunition interchangeability. (This was before the 1905 dissolution of the two nations' union.) Modern 6.5x55 ammunition is normally loaded to dimensional and pressure specifications compatible with any 6.5mm Norwegian Krag (or Swedish Mauser) in original, serviceable condition.

In the USA, those specifications are maintained by the SAAMI and include a maximum average pressure of 46000 C.U.P. - a figure not excessive for the Norwegian Krag action. 6.5x55 cartridges are currently offered by Winchester, Federal, and Hornady - but in these times of globalized sourcing it's not always apparent where components are manufactured and assembled.

If I were purchasing commercial ammo for my Krag, I'd pay the very reasonable premium (about 20%) for Lapua - knowing that quality would be outstanding.