Usually farmers didn't have a cabinet full of rifles.. 2-3 at the most.
So they needed something that could handle anything.. even crop raiding elephants.
9,3x62 maximizes what you can get out of a standar M98 action without much alteration or excessive recoil.
And it was the mainstay of nearly all African hunters up until 50s-60s. until supplies ran out.
The 270 is just a Chinese 7x64. Another great German round.
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