Disable Auto Aim focus on 3 variables for increased accuracy:
fAutoAimMaxDegrees 0.1 <-- Increases straightness of projectile
fAutoAimMaxDegrees3rdPerson 0.1 <-- Increases straightness of projectile
fAutoAimMaxDistance 64000 <-- Should prevent projectiles from raising (old engine issue, assume it's still there)
fAutoAimScreenPercentage -1 <-- 0 would also disable, but I believe causes issues. Maybe can't divide by 0? Who knows..
I have increased fAutoAimMaxDistance from 4000 to 6400. According to GECK, 64 units is 1 yard. If this holds for F4, then auto aim should cut off after 100 yards. This is to go along with a typical rifle being sighted in at 100 yards.
I have also decreased fAutoAimScreenPercentage from 6 to 1. This means you need to aim closer. Setting it to 0 is supposed to disable auto aim, but it has been said that 0 caused issues in F3 and NV.