Kooler's, question was specifically about 6.5X55mm 'Swedish' Mauser military ammunition in his Norwegian Krag.

(IIRC - The two countries never had quite identical ammunition).

Since the Swedish Mauser is considered a stronger action, with maybe better metallurgy than early Norwegian Krag rifles, his question is a prudent one.

(The Swedes also made ammo designed for their Ljungman semi-auto rifle. These rounds may have been OK to use in a Swedish Mauser, but, were not intended for the Krag).

There are loadings for the Swedish Mauser and Ljungman that are considered too 'hot' for the Norwegian Krag.

FWIW - I would avoid shooting Swedish Military ammo in a 6.5X55mm Norwegian Krag. I would confine its use to good condition Mausers.

I would shoot limited amounts of commercial, Boxer primed, 6.5X55mm "Swede" ammo in a Norwegian Krag for Hunting/Target use and to have a Brass base for reloading.

I would reload 6.5mm ammo to the lower pressures intended for the Krag.
The Scandinavian cartridge is 'rimless' and does not have that nice extra 'gas seal' (case-rim) in the event of a case failure.
(The rim is a nice safety feature of .30-40 ammo).

Scandinavian shooters are knowledgeable about these rifles and cartridges. From what I've read over the years, they were conservative about pressures in the Krag.