That's not how it works. Gerald Bull invented a new alternative for rifling that made tube artillery a lot more efficient. Propellants also imporved since the early Cold War. And guided munitions do solve the problem of CEP, which also increases the range. In the case of rockets, the only way forward is developing better propellants. But then you could use those better propellants in rocket-assisted shells too. Truth to be told, you can increase the range of a rocket a lot easier, as you just have to make it longer and fill it with more propellant. But those rockets are already quite long, and making them even longer would make reloading even more complicated.
Could we one day see the return of heavy artillery such as the 240mm?
Yeah. Looks cool and all that. Where's the BDA though?
did he use progressive rifling?
No, he invented the extended range, full bore concept. As far as I understand the rifling is virtually the same, and the difference is in the projectile. Instead of applying an oversized copper ring it has a few fins that follow the rifling, and so there is less drag from the barrel. You can see them in pic related.
ERFB has nothing to do with rifling, stop using Wikipedia for research. The real purpose of the fins is to act as a low-drag bourrelet. In order to prevent yawing in the chamber a conventional shell needs to be cylindrical from its driving band to just ahead of its CoM (pic related), which obviously is not terribly aerodynamic at Mach 3. ERFB shells only need to have a 155mm diameter at the driving band, allowing the use of a much finer projectile shape.
I want siege mortars and siege howitzers.
That's basically what he said.
Yes, well a designation button, in the front grip.
Yes.
Yes.
Or is there some kind of a safety that doesn't deliver the order if they choose a point that is too close?
Yes, if it runs on auto.
so what range could your typical destroyer gun get with such a upgrade?
wow this is actually cool as fuck. is that a non backlit lcd or e-ink or something that that display works on?
Imagine the awesome battery life if they had a high contrast e ink display