coll416 said
"Sounds a bit like the nut behind the butt, please don't blame the tool! My experience with .270W is extensive with hundreds of clean kills on animals 50kg to 350kg. The cartridge is a surgeons weapon, however dodge the big bones on the close shots ! "

I also have made more kills with 270 Winchesters than I can count. I have had 0 complaints, as long as a good bullet was used. I can say the same thing about good bullets on any game and from any bore diameter. A poor bullet that fragments and doesn't penetrate is not dependent on it's diameter when it's in the shell's neck. It's just a poor bullet. Be it .243" or .366" And yes, I have seen both in those diameters.

I also avoid the biggest bones when shooting close, but not because the bullet don't get through and exit. They do. What I don't like is the damage it does to the meat, so I avoid bone shots on close range deer and elk for that reason alone.

I shoot only those bullets from my 270s that the last 50 years of hunting have shown me are good. 130 Gr Partitions, 150 Gr Partitions, 160 Gr Partitions, Barnes X in any weight, The old 1960s made Remington Core-Lokts in 150 grain, the new Fox bullets made in Slovenia, any bonded bullet of 130 grains and heavier, and a handful of other standard "cup and core" bullets that just work fine.

Ascribing a damnation, or some virtue to a mathematical measurement is a sigh of a lack of logic or wisdom.
I have to give the author credit, in that he did acknowledge this point.