In 1948, Bell opined that the .308 Win. shooting 200 or 220 gr. bullets at about 2300 FPS would be an excellent rifle/cartridge combo for elephant. That article was in the American Rifleman BTW.
PJ
I credit Bell with a hell of a lot, but recommending a rifle in 1948 that didn't didn't come out till 1952 is really a case of " forward thinking".