I've found a barreled action from one of the Remington Titanium Ultralight rifles, it's in 30-06 and the bore looks new. I'm looking for ideas on calibers for a new barrel, I would also replace the bolt with a PTG setup so bolt face isn't important. Since the action is Ti it wouldn't make sense to do anything but make a light weight rifle with it.

Only complications are I already built a mountain rifle out of one of these actions in 280AI. I'm currently thinking 6.5-284. Ideas?