A really funny post . If I may add some facts to it . Japaneseammo #1 Blank , a wooden , or later , rolled paper bullet - purpose to make noise upon firing for training . #2 short range target practice , a tin or aluminum cup bullet [ like the swede stuff ] - purpose 7 meter target practice . # 3 Grenade launching blank , NO bullet star crimped neck - purpose to launch rifle grenades . I have a large Japanese ammo collection that includes all of the above . I have a Japanese rifle grenade launcher and have launched grenades . I have fired several types of military ammo with wooden bullets indoors using a few sheets of packing cardboard to stop them at 7 yards and they are always tumbling . I would figure you would have to be within 5 feet to really hurt someone with them . Sorry but a lot of old vets do not remember well . I had one old guy tell me how the Japanese could shoot our 30/06 out of their rifles , and that he himself did it .