Function get_drag_coefficient_with_transonic 

pub fn get_drag_coefficient_with_transonic(
    mach: f64,
    drag_model: &DragModel,
    apply_transonic_correction: bool,
    projectile_shape: Option<ProjectileShape>,
    caliber: Option<f64>,
    weight_grains: Option<f64>,
) -> f64

Get a standard G-table drag coefficient without double-counting transonic drag.

Standard G tables are total-drag curves that already contain the transonic rise and wave drag. apply_transonic_correction and the shape inputs remain in this public API for compatibility, but enabling the option does not stack the separate empirical rise/wave model on top of a G-table coefficient.