I chronographed some Sellier and Bellot .270 not too long ago, 130 grain bullets clocked 2770fps out of a 23.5 inch barrel.
The same rifle shoots a 130 grain interlock to 3105fps with a max charge of H4831

So factory ammo is still about the same level as a 7x57.

I have shot three red deer with a black powder loaded .44-40 just recently, At 80 metres. I chronographed the pure lead bullet afterwards at 1125 fps.
None of those three went more than six yards.

This is what makes a mockery of his article. If he cant kill a little whitetail with a .270, well, I dont know what to say. Some people kill grizzly bears with them.