The environment. The humidity can affect an individuals ability to handle a potentialy fatal wound. Hot, cold, the weather at that moment,and materials at their disposal can all affect the survival time. Or if they are, say, average American, in thier mid twenties, strapped to a chair in a dry, 70 degree farenheit room and shot with a Colt .45, I say 20-35 minutes.
Well Kach, you've been the closest so far. Any one else for some glory?
*walks away*
Okay, this is what happens.
You're in a store with the door locked and no way to get out. Some one shoots you in the stomach. If you alony account thestomach acid, how much time do you have to live?