this question starts to trigger me, from swedish forum on gunboards
https://www.gunboards.com/threads/vapen-...94/#post-303008

"The 8x54 Krag conversions are an interesting subject in Swedish firearms history. I’ve included photos of my 8x54 K conversion and a page from the 1939 Vapen-Depoten catalog that describes the specifications for the conversions they would do on customer’s rifles. Below is my translation of parts of the page. I’ve included the M-30 B description of specifications because my rifle matches the various things that were done to the rifle. If I’ve mis-translated any of it, I hope one of our Swedish friends will correct it.

“Conversion of 6.5 mm. mauser rifle, mod. 96, to legal hunting rifle according to the new hunting law of June 3, 1938. A county authority permit is required for conversion.”

“M-30 B. Conversion to a finer repeating sporting rifle. The barrel is shortened {cut} to 66 cm. (other lengths on request), stock is cut, altered to a halfstock and polished, forearm grooves are removed . Military sights are removed and new hunting sights are fitted consisting of a 2 folding leaf sight and new silver bead front sight on a long base. Rifle is regulated at 120 and 200 m.{meters} The barrel is oxidized blued. The bolt handle is bent down and a new sling swivel is fitted to the barrel. “

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"Perhaps the Swedish members can tell us about the 1938 hunting law that allowed this conversion. This date seems to indicate that Swedish use of the 8x54 Krag cartridge came quite a bit later than Norwegian development and use which I believe dates to around 1920, if I’ve read Hanevik correctly.
This is a scan from a 1935 Vapen Depoten catalog.

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so it looks again like the 8x54 was an original norwegian conversion for the krag -jörgensen from 6,5 to 8 mm.
but the cartridge was seeing real use later in the 1930s/40s for mauser sporter.

Vapen Depot Falun was a swedish mail order hunting outfitter. I have only some pages of an 1970 catalog that gives you an idea about it.

this rifle have still the original military rear site https://www.youtube.com/watch?v=10kHZWUXMUE
whatever the customer wish and was willing to pay for.