Contrary to some rumors, the Krag–Jørgensen action can be modified to fire modern, high-power cartridges. During World War II, and also in the early 1950s, several were produced in 7.92×57mm, which can hardly be considered a low-power cartridge. A number of Krag–Jørgensens have also been converted to .30-06 and 7.62×51mm NATO for target shooting and hunting. However, it must be stressed that these were all late-production Norwegian Krag–Jørgensen rifles, made in an era when metallurgy was vastly more advanced than when the American Krag–Jørgensen rifles were made. The American Krag–Jørgensen also has only a single locking lug, whereas the Norwegian and Danish versions effectively had two lugs.