a small rocket assist can change that.
Most of these long range guns have some sort of system that has an assist similar to a rocket firing from the back to fix some of the aerodynamic problems. That’s how they can get some longer distances. That is what Bull invented.
Bull did not invent the rocket assist projectile. The Germans were firing them from Sturmtigers in WW2.
What Bull *did* invent (or rather engineer, as others had came up with the idea decades prior) is the multiple firing chamber or “booster” gun.
Correct me if i am wrong, but given the angle of trajectory and distance, can we not ascertain the apex? True, most formulas i’ve seen thus far take velocity into account. Methinks an extrapolation would work with only the two givens, provided the points of origin and destination are ground level and within Earth’s gravity. Mass and wind may also factor in, but for ball park purposes it would be interesting to hash out a figure.