The aerodynamic effects you mention are real, but they are subtleties. Unfortunately, I have not been able to find a high quality, open-source ballistic calcula

The aerodynamic effects you mention are real, but they are subtleties. Unfortunately, I have not been able to find a high quality, open-source ballistic calculator that actually breaks out all those details. Apparently, "Modern Exterior Ballistics: The Launch and Flight Dynamics of Symmetric Projectiles" is the book to read if you want to know more. Although considerable basic research is funded by the DoD, and considerable open-source has been generated by them, and of course the DoD has done a tremendous amount of research on ballistics, I suppose it makes sense that they have not actively encouraged the publication of an open-source artillery targeting program.