if basic dispersion is the bullet’s tendency to veer due to unavoidable factors such as atmospheric conditions, then it should be far lower for heavy and/or high velocity rounds.
So a .50 sniper round should have virtually no ‘dispersion’ out to sight range as defined in the game, while a .30-08 should have relatively little, while a .22 rim-fire round fired from a short barreled pistol should have pretty much the worst (not counting shotguns shells of course, most of which are designed to disperse).
Given that most vehicular turrets are designed to fire rather heavy rounds at generally high velocity, they should feature very little dispersal.
Also, why can’t we craft rifle scopes, given that we have access to high-precision lenses? That seems like a no brainer. I could see being unable to craft a really high end precision military scope - but being able to put together a basic ‘survivor scope’ that beats iron sights would be pretty straightforward methinks.
Cause the things are impossible to find. I have a current endgame survivor with an entire array of power armor suits (including the rivtech one) to choose from and a literal arsenal of 90% of the game’s firearms - but not one scope of any kind.