Aiming prediction marker improve

[Odin]

How can i make the marker of aiming, to be more acurate,because on jets for example, if i burst at high speed , it's not going on target...it feels like the prediction marker is not that acurate at high speed.
If i adjust the Velocity of the bullet or the Air Drag, not in a crazy parameters but lets say, half of the standard, is it going to be better or i will mess up the parameters for the Aiming Marker? Or give me a tip about these settings to improve it.