I will say this, I don't think that well-heeled sportsmen hunting in Africa are necessarily a good representation of the typical American hunter. Maybe it is just a regional thing but virtually every hunter I know practices for a 300-400 yd shot and expects to have to take one. You can usually get closer but for someone to blatantly state that it is unethical to shoot beyond 350 yards turns me off. Maybe shooting elephants and buffalo beyond 350 yards is unethical but where do we draw the line? Is it unethical to shoot an unwounded woodchuck at 500 yards? Maybe African game is afforded higher life status than American game.
I don't doubt that many shooters show up over gunned and under practiced however.
I don't know a damned thing about anything in Africa.
But in the mountains of west or central Idaho, a working man had better be prepared to take a 400 yd shot, or else be content with a freezer which spends many years void of game.
If you push that 150 gr Partition to 2900 fps from the 270, it is down to 2150 fps at 400 yds. Similar to a 30-30 at 50 yds. Sure, it will kill an elk.
But I consider it valuable insurance that my STW is still pushing a 160 to 2600 fps at 400 yds.
People who choose to brew up their own storms bitch loudest about the rain.
