WWII Vintage Ammo

[Steinar]

From someone who has seen his part of western movies (hence my avatar), the trick of tossing a round on the fire.. pointing towards the place where the bad guy is sitting and then go bang-killing the bad guy and saving the day. Is not very realistic
Same goes for your vintage rounds, if they should somehow go off outside a chamber, there is not that much punch in them.

Like when I was working in the military, we had a big fire at the shooting range where empty boxes of ammunition where tossed in. Solidiers and officers standing around, warming themselves in the freezing temperatures in northern Norway. Somehow one or more boxes of .308win rounds where tossed into, many of us where hit by fragments, including me. But non of them penetrated trough our clothes, just didn't have the speed to cause any injury at all. When we later dug out the box, most of the rounds still had the bullet intact and with the shell split up.
I would think the same goes for 9mm ammunition, if it should explode outside a chamber, it could expand in all directions making it quite harmless.
One exception would be the .22 caliber rounds, heard they can bite even outside a chamber..