Grew up hearing a lot of anti 270 rhetoric/Fudd lore from the old folks in my family on account of an incident or two where moose seemingly walked away from being pelted several times with one. When you are a kid, it sounds legit. Even the "zips through so fast it doesn't open" stuff.
Til I met and started hunting with some pretty accomplished folks who used a 270 Bee and a 270 Win. And killed. What do you know, if a 270 Wby was driving those bullets through both sides of bullwinkle with good expansion and he was tipping over, hard to believe the 270 Win wasn't gonna.
I was a dyed in the wool 30-06 man until recently but have to admit, the 270 has some better numbers behind it. Its a stout, well weighted bullet moving fast. Hard to argue with.
Perhaps back in the day, people were driving less effective 130 grain bullets into big animals too fast. I dunno. Or just not shooting well, but bringing up that theory was not very popular