ORIGINAL: Ausie-guy
I'm trying to decide between the .270, .30-06, 7mm. Rem. Mag., and MAYBE the .300 Win. Mag.
Out of those you have listed I would go for the trusty old 270
You hunt witha stick and string! Are you even allowed to have a firearm Russ?

But correct a 270 will work well as something larger just shoot it well and problem solved!