[kenrikm]

The quoted range was two miles though I have to think that was within the atmosphere. Even in LEO something fired @ 1500mph relative to the source should continue to travel at that speed unless it interacts with something no?

[rtkwe]

It'd slow down eventually, LEO still has a really thin atmosphere that would still affect a bullet, it'd be way longer than 2 miles though. Effective range makes more sense for a spacegun and would be more of your ability to accurately point and fire than the distance the round could travel. If you can only accurately hit objects within 2 miles the fact that the rounds would orbit for a while doesn't really matter.