If you wanna be the kid on the block with the shiny new toy go for it, but it's not doing what hasn't been done. I'm sure somewhere down the line the nuances mean something to someone.
It's not just about bullet speed. Components, factory ammo and all that jazz. Point being there's no point. Coke is Coke, whether it's new Coke or Coke Classic. You said 140's at 3000 isn't a mystery. 264 vs 277. Yeah, your gonna see less drift in higher BC bullets. That's a fact.
But what is Joe Average gonna get with his new hot rod whizzbang over some old skool whizzbang? Likely nothing that he'll ever see, especially if he's only shooting less than 400 yards. 270 sounds boring, 6.5 PRC sounds exciting like you're a real rifle looney.
But never ask a barber if you need a haircut.
