Just a quickie really and by no means a request or order since the mod author is probably a busy bee but as a general though perhapes quality could be changed to effect the range of ammo (mainly for the pistols, rifles and shotguns) since with quality increases to gun turrets it can increase the turrets range beyound the range the projectiles can reach, same again for pistols, rifles and shotguns which can have a larger fire range then the projectiles can reach.
If by chance ammo quality is changed to boost range per level i think reducing the quality effects on damage would be a good way to balance it out (considering krastorio 2 ammo is really good to begin with in terms of damage density at base level.)