This has nothing to do with support, I just could not find a thread to drop it in to.  Not a wish, GD, or other....
When you fire a round into 3D space, how big is it?  For example, is the .50 bullet 1/2 of an inch relative to the aircraft when it strikes it?  I have it stuck in my mind that it is all about pixels, but I suspect (not a programmer) that is is not.