Tripwire Interactive Forums

I don't know, when I'm with a rifle and I try to hit an enemy soldier, I almost always miss, I then try to play with the mouse wheel and change to like 300 meters of 500 meters but it doesn't change a thing...
Do I actually need to use this? what is the recommended ***meters setting?
Is there a way to measure the distance between me and where I'm aiming?

Thanks!