What's the ultimate long range rifle cartridge?

[haugenna]

It is for windy days when getting closer is not an option.

Wind and distance are not a good combination. 

Hats off though to the 338-378.  That...in my opinion, is the ultimate long range hunting rifle.  I have is 30 cal little brother.  The 338-378 destroys almost all of the 338 calibers.  The lapua doesn't hold a candle to this one.  Neither does the RUM.