Excellent responses--

The real purpose of the impractical question was to determine the best range or "niche" of various calibers to cover specific African game or situations encountered.

Empirically, It seems having a Double of about 3000 ft pndsenergy, 4000 ftpounds energy and 5000+ft pnds energywould deal with virtually any fun planned nicely along with an ancillary interchangable shotgun barrel. We could have a "light-medium" Double,a "medium" Double and a "heavy" Double with corresponding levels of recoil.

Would the 300 Flanged trajectory make it better at distance than the 9.3 x 74?

Would the 375 flanged have a better trajectory and longer distance hitting capability than a 450/400?

The 300 Mag is the North American all rounder. Is the 375 Flanged the African all rounder for Doubles?