I believe that the 'Magnus effect' was originally observed with the 'KRUPP' artillery projectile, fired from a rifled cannon.
It would have been a state secret at the time. Classified. Involving another order of magnitude of sophistication in firing solutions to predict compensation for the spin-related 'lift'/ drift.
The Aberdeen Proving Grounds provided a subsonic-to-supersonic drag table for four projectiles in one of my reference texts, and the 'Krupp' ( 'soup-can ) projectile was one of the four listed.
Imagine a 'bullet' with a sub-MACH drag coefficient of 0.88!
