Something that I am sure lots of #scifi writers and gamemasters have thought about:
How bad is it when you get bullet holes in your space ship?
If you can get to safety before pressure drops to 30 kPa, you will be fine. At that point, you might have a minute or two before you pass out.
I found this equation to calculate how long it takes for pressure to drop that far:
Time(s) = volume(m³) / hole (cm²) * 30
One bullet hole in a 2x2x10m corridor gives you 12 minutes to deal with it.
Doesn't the threshold pressure depend heavily on what atmosphere you have there in the first place? (I'd expect it to be nearly 5 times lower if the atmosphere was pure oxygen compares to same mixture as air on Earth.)
