None of the above; sorry. Already divested myself of all my .30 cals, and I've never been a fan of the .270.
If I could only have one factory-loaded cartridge, it would be a 7mm-08. Not sure which rifle. I'd want a lightweight for hunting, something heavier for targets. Split the difference and I'd look for a second-hand Remington 700 VSSF, although it might be a lengthy hunt to find one for $750.
So what caliber do you have?