RE: .375 Ruger m77
The danger of new things like this is if you get to Africa and somehow your ammunition doesn't make it with you, you'll end up throwing rocks. Whereas if you had say the traditional 375HH, you can always buy ammo as needed and be assured from past experiences that it will work wonderfully well. I think ultimately this new cartridge will be received with a big yawn by the shooting world just as many similar cartridges before it.