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Reply	petethebloke says: If you're thinking that the propellant (explosive) requires oxygen, then think again - all the material it needs is contained within the cartridge casing. For the same reason, a gun should fire underwater, but the bullet won't fly very well.  (no votes) Tags: fire, vacuum, Bullet, Gun.
	posted on 2010-12-22 10:17:54 | Report abuse