For 500 meters against the wind it would not guarantee a stable velocity, thus not a stable path length over certain time (it would probably be non-linear to ca

For 500 meters against the wind it would not guarantee a stable velocity, thus not a stable path length over certain time (it would probably be non-linear to calculate). So, it seems to exist a correlation between the RPM of the projectile and its velocity over wind's influence that guarantee a linear calculation over the RPM of the projectile.