That's a fine 1912 carbine!
m4a3sherman: That is a mighty nice 1912 Norwegian carbine you acquired. What is the condition of the bore? In regard to the small swatstika marking on the barrel, I believe that it is a Norwegian marking and identifies the barrel subcontractor. This seems to be a common marking unrelated to the Nazi Occupation of Norway. In regard to factory loads, a good number of contributors to the Krag Collectors Association Forum have reported using factory ammo without signs of excess pressure. If you need a brass base, you could always disassemble factory loads, discard the powder, and reload with an acceptable starting load of a powder you prefer.
small swatstika on Norwegian Krag barrel
m4a3sherman: Exceptional Model 1912 carbine -- all matching #s & excellent bore! I am happy for your success. The Krag Collectors Association forum had a response yesterday from a Norwegian, "mussonor", (collector and Norwegian Krag authority). The question concerned the small swastika with numbers on a sporterized Norwegian Krag. Mussonor's answer was that it was an old Norwegian marking identifying a barrel subcontractor, way before the Nazi use of the swatstika.