hi frank
thanks for serving all you veterans that served god bless all of you guys now the japanese nambu ammo i have found in over fifty years they never had a head stamp all i ever came accross 8mm was blank not the babby nambu was 7mm thats very expensive ammo scarce as hens teeth and hens dont have any teeth now the rifles was 7.7 and 6.5 calliber they also made 7.7mm japanese 99 machine gun ammo strips i have a few of them please remember the japanese machine gun ammo 7.7mm is different then 7.7mm rifle ammo hope this info has helped every one god bless andy militarynut