@ Clem,..
I'm aware that, the 6.5 Creed comes from, the Parent case of .30 TC ( I was making a Joke about, how it was Formed off, the .260 Rem. ).
The only thing that, I care about, is that, the 6.5 uses, the SAME, Bolt Face, action size and Shell Holder ( And comes in,.. a Lefty, T-3, TIKKA ! )
I usually, choose my Cartridges by, HOW they,.. PERFORM / "Kill", in the Field, Velocity, Bullet B.C. and Brass Case Mfg. "options" ( availability ).
The 6.5 Creed, "Kisses, the Butt end" of, the FINE, 270 Win with, some loads and Kills, Deer / Antelope,.. very, VERY, WELL ( a YouTube,.. FACT ! ).
YUP,.. IT Kills Better and FURTHER OUT than, the .243 Win. "can" ! IT'S,. the Physic's of, High BC Bullets, SD, plus,.. ADEQUATE, Velocity !
I chose the 6.5 Creed, because it,.. IS, "Better" than, the .243 Win. and very "close" to the .260 Rem. for, the size of Game/ distances that, I want to shoot.
I HAVE, other Rifles for,.. Elk / Moose. I like the 7mm-08 too and that's what, my son shoots for, Elk ( 168 gr. HVLD Berger's going, 2,765 FPS )