Hi All,
Just a thought, if you are worried about ammo going missing............... why not arrange for the folks you are hunting wiht to get a box or two as insurance for you
Before you get that Dammned Weatherby.................... talk to your outfitter/PH and see what they say. I'll bet that they are not too happy about it as the Weatherby's have a shite reputation on actual game

The 458WM at a geniune 2100 fps would be so much better. The 416 Rigby or even the Remington 416, the 404 Jeffries or perhaps the 450 Rigby Rimless would make your PH so much happier
For .375's the old H&H 375 still takes some beating
Have fun and good luck.