Q: I have a sporterized rifle found in my late grandfather’s basement made from what I have determined is a Norwegian Krag-Jorgensen. It has a date of 1924 stamped on it.

My father owned a 6.5x55 mm Krag Jorgensen—a so-called “boy’s carbine”—designed for rifle training in the Norwegian high schools in the early 1900s. He used this gun for hunting and ...