What cal should i build?

[screech]

I am in no hurry to build the gun. So with that out of the way.
I have a LA rem700 Bare action.
I was thinking .280ai or some thing along the 7mm line.
It is a 06 bolt face with the factory trigger still on it.
I want o reach out to 1000yds for steel but only 500max if I get the chance to hunt with it.
Black bear, deer, elk, steel are my intended uses.
What call any why you'll you go with it?
Go easy on me it's my first post. Thanks Jake.

280, 280ai, 6.5x284, 6.5-06, regular. 30-06. All would work I would run the 6.5x284 but that's just because I'm familiar with it and it's one of my all time favorites