I have had a lot of experience with fine tuning mice in Battlefield. (I'll have to make a video on this some day)
- First go to your computer and set your windows sensitivity to the 6th notch (this should be default).
- Next you'll probably want to disable mouse acceleration for FPS gaming (If you don't know how to do this just reply to my comment asking how).
- Now go to your main browser or desktop, open up Razer Synapse 2.0 and keep changing the sensitivity setting until you can comfortably move the mouse from point to point without missing, If you find the right sensitivity this will feel natural to you within 20 minutes (I personally use 3200DPI)
- Now go into the game on the test range or a empty server with the gun sights you will be using the most (If you are new to the game I would recommend using the Coyote[Chinese] sight)
- Now face a point on a wall and do a 360 turn to reach the exact same point, Measure that distance with a ruler.
- Adjust your in game sensitivity until you can comfortably move your mouse between two points both Hipfire and ADS without over-aiming or under-aiming.
- Now play the game on that sensitivity for at least 20-25 minutes, If you are under-aiming raise the sensitivity a little bit and Vice Versa until you hit a sweet spot.
- Measure the distance for a 360 of your mouse and use this setting in every game you play (I personally have 4.05 inches for a Hipfire 360 and 6.6 inches for a ADS 360 on a Deathadder 2013 mouse, however most people in Battlefield use around about 5 inches for a Hipfire 360 depending on their playstyle)
Sorry for the long answer but I really need to make a video on this sometime