The explosion is happening inside the sealed cartridge, so the outside doesn't matter if there's a vacuum or not. once the explosion has happened, the bullet is on it's way. It's like if you have a structure(bullet+casing seal) in space (vacuum) with dynamite in it, with the right heat, the TNT(gunpowder inside sealed casing) would ignight and go off.
Why wouldn't you trust meh, dasc?
I understand now
Why wouldn't you trust meh, dasc?
Because you touch yourself at night.
Exactly.
sadist, water+smokeless powder=dud
EDIT:
dascoo, please give me your logic on how it would not fire.
I thought oxygen is needed for the gunpowder to ignite? Seems that i'm not thinking properly.Or am I right? I don't really trust you peemonkry on this one 
Explosions can not occur underwater. Can fire burn underwater? I think that's kind of obvious, but maybe not to you, so I will provide you with the correct response: liek hel no
Please, use words, or die.
omg wurdz r 4 nubz
But OK. =]
Because you touch yourself at night.
I agree. angry.gif
Actually if you have aquired half the amount of volume of water, and replace it with antimatter, it creates quite an explosion.
