full disclosure: I'm a deer hunter (and coyote killer, when I see one). I actually think many catridges - 260, 270, 7mm08, 280, 284, 8mm mauser, 308, 30-06, 7.62x54 and so on are pretty similar for my purposes, and prob for most deer hunters. So, that said, I'll value easy ammo availability and versatility. But then... my current favorite deer rifle is a 336 in 30-30, which many consider limited. I've had a 30-06 and a .270... wish I'd kept the .270
never read anything by O'Conner, but his name sure does pop up a lot as some kind of sage re: 270, though I think the cartridge is fine on its own.