You managed to make the Sniper Elite style shooting, that's very impressive! Good use of the engine with the post processing and lighting.
I don't know if you know this but those lower horizontal bars in the sight is supposed to be as wide as the width of a mans shoulders at that given distance. So you use it to gague distances. Line up the shoulders with the right bar to know the distance and you will know that you are compensating enough for bullet drop! - If you can manage to get this in the game you are golden.