If you´re in Europa there are few gunsmith in Germany who are capable to modify a Mauser 66 action up to .460 Wea Mag.
Personally I own (beside others) a 9,3x64, a 9,5x66SE, a .416 Ruger and a .450 Rigby.
The price for a used M66 is far below 1000€, costs for a new barrel approx. 1000€. In total you will pay for the gun and for all gunsmith work 2000-2500€.
If you rely on the M98 action, then you should consider cartridges which are within the 85mm limit like the .375/416. Ruger, the 9,5x66SE, the .458 Win Mag for instance.
This will work in Africa.
This year a friend of mine and I were hunting in Zimbabwe. My friend carried a new Rigby in .416 Rigby, I used my M66 in .416 Ruger.
I paid less for my complete rifle than my friend paid for his Swarovski Z8i....
The result on the buffalo was the same.
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