I also have a 30-40 Krag-Jorgensen from the end of the 1800’s. It was the first smokeless US military cartridge, but was replaced by the 30-06.
You seem to be a pretty lucky guy.
May I infer from your screen name (MtnClimber) that you live out west, somewhere with wide open spaces for shooting?
Montana, Colorado, Wyoming, Idaho, Utah...