Weight has literally nothing to do with wind drift. I have no idea where this ever came from.High bc higher velocity more weight all 3 fight wind. If you personally cant shoot bigger gun accurate thats fine shoot smaller but know your distance and capability
The equation for wind drift is this -
Wind drift = Wind velocity * (time of flight - time of flight in a vacuum)
Notice bullet weight is nowhere to be found.
The only thing the person using the gun has any ability to change is the time of flight. Which is made up of muzzle velocity, BC and distance to the target. Assuming distance to the target is the same for comparison's sake. It's just BC and muzzle velocity.
Do you think that 6mm cartridges & bullets cannot have high BC and/or high muzzle velocity?