Not sure I should have started this thread ... I've started mucking about with my settings and my K/D has taken a nose dive
It is all about muscle memory. Your brain have to re-learn new settings. Once you find better dpi/sensitivity = when it is just right for you to stop missing shots due to too high sensitivity/dpi but you will be able to turn 180/360 without lifting your mouse, stick with it and your brain will adjust. It may take days btw.
