Man I wish I had your problem. Deciding on which .375 to take to africa! I don't have any experience with hunting the dark continent nor do I know what type of game you are going for. But IMO, the 375 Ruger cartridge packs more punch than the .375 H&H and you said yourself that it gets on target quicker. The M70 is a nice gun and has a long heritage in Africa but you do handle the Ruger better. So that gets my nod.