What other factory 270 fast-twist rifles are available?
What 270 loaded ammo with a high BC (>600) is available?
The Military just adopted the .277 as their primary rifle caliber.
The 6.8 Western, the first higher-twist commercial .277" cartridge, ttbomk, was just released not too long ago.
It took the 6.5 CM Ten Years, and aggressive marketing, to rise to it's current level of popularity, given that it is essentially a 6.5x55mm in short pants.
On the other hand, since the advent of the 7 RM for heavy bullets, and the 6.5 CM for higher BC, the .277 community, which is predominantly game hunters and not paper punchers, have been asking for higher twists and better bullets.
And that is now being addressed.
Note: Rifleman pride themselves on how Close they can get to their game before they have to shoot.
So, your academic perspective is somewhat retarded in the hunting fields.
400 yards - is a long field shot, as is even 300 in less that ideal conditions.
A Higher twist .270Win, with a higher BC, will still shoot w/ the same precision and mild recoil, but make those longer shots, on heavier game, a little easier in those less than ideal conditions.
Your Sniper fantasies not withstanding.
GR