If he suggests a longer cartridge is preferable over a short one, I would agree. I like a cartridge that looks streamline and aerodynamic. I know, it doesn't need to be but a gentle shoulder and a long neck gives the round more suitable for me. I don't like to seat the bullet beyond the neck and no chambering slips into the chamber like a 30/06 based one. Perhaps a .375 or .300 H&H will, but not many short /fats are as good at it.
The .270 wcf is a classic, has improved with age and is my first choice for sheep hunting, the .280 will do the same thing. They hit harder than they should, you can put them in a 7 lb rifle with a 22" barrel and won't regret it. Cheers