I can make 6.5 creedmoor rounds for 62 cents.
I have many rifles in that caliber, but I also maintain 308 as well. The 6.5 is so popular now that finding ammo is a moot point.
I love the 308, but I will say on extensive testing and shooting that 6.5 creed stomps it into the dirt. Hits harder, flies further easier and makes an even average shooter better.
Then why not the .30-378 Weatherby Mag?