Hi.

A common setup of the krag for target shooting in DFS. M30 stock, heavy 21mm barrel and the Schou diopter. Trigger also M30, or perhaps an adjustable S&L?
By seriail, the receiver show it was stationed for the IR2 (Oslo) in 1940. Later been choosen to be proffesonally modified to a M30 style target/competition rifle. As you mention, it will shoot weel. At 300m the best guys managed to get 10 round groops at approx 100-120 mm in the 80-ies before the Sauer 200STR took over.