This thread is supposedly about a 270 being the end all be all hands down best caliber out to 600 yards for deer and possibly elk.

What’s next pachyderm hunting to further muddy the waters with a 6.5mm Vs 577 Nitro Express?

A 270 Win is no better than any number of camberings out to 600 yards given bullet selection. What does that have to do with dangerous game? If anything your 338 Win Mag proves the point. That a relatively small for caliber for the game being hunted (compared to a 375 H&H or 458 Lott) works just fine.