280 or 280AI would be my pick
Its easyer to ream a 7mm08 barrel out to 280 with a minor set back to loose the caliber stamp under the foregrip
I like my t3 280 but 270 is no longer the red headed stepchild it once was
Id try out the superformance hornady and replicate it with a handload
pretty convenient having a common caliber too, good luck finding ammo on shelves with 280rem
Id leave it 270 at least for a while, till you are set on spending that thousand dollars+ on a new caliber
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