So is it therefore impossible to use this tactic? I'm scared to test it out in-game without knowing for sure...Great guide! However, I feel compelled to add that the 3-minute return fire delay has been fixed. You can no longer shoot and scoot, or at least not without the possibility of return fire.
As far as I can tell, if you can take them out with one volley, they don't get to return fire. So their must be a delay of a second or two, but that's it.