such children:they was much trading going on alot of troops that were not in combate traded for articals and so rifles captured went home.the grinding occured after japans surrender.and some officers were gun ho on regulations and others werent.Its true som guns were cast and dangerous,BUT that was because they were not made to shoot bullets but blanks I have had them,also one that I had, I have never seen mentioned and that is 7.7 cast receiver that the bolt entered the barrel and locked.I have 5, 7.7 and 2, 6.5.
and the ammo is corrosive so a gun not cleaned,will rust.the 7.7 is cromed the 6.5 was not.and you can make it from 30/06.and I would hazard that norma does that.their cases bulge more than 06 does. grafs has 6.5 brass.