read an articel about this(believe) 408 Cheyenne Cartridge, if the half is true it is the best long range cartridge now. the bullet question is the main problem and Cheyenne have bring this into a new dimension. the cartridge is based on the 505 Gibbs, interesting to see that more and more long range military sniper cartridges base on big game rounds or original big game rounds used.

338 Lapua = 416 Rigby
9,3x64 Brennecke = new russian sniper round
408 Cheyenne = 505 Gibbs

I think we will see more of this in future