Ya, but Bull didn't try to make his space gun mobile, so it only hits 8.7 on the crazy meter.
you didn't have to make that gun mobile, you could fire that thing into ultra low orbit, and hit anywhere (at least in theory)... surely the scale of the gun, and the fact that they where going to build two of things makes it a 10 out of 10 on the holy crap thats wasteful meter
Bull was also operating at a time when super guns had been discredited and supersceded by aircraft and rockets for 40 years... that also has to give him bonus points