While trying to keep this discussion to rifles shooting .277 caliber bullets, let me add
Once saw a beautiful rifle sitting on a local dealer’s shelf for ages. Looked brand new but it wasn’t. It was chambered in that magic cartridge, .25 Super Super Short Magnum. A round almost as good as the almost 100 year old .25-06.
So, getting back to the Super short .270’s the 6.8 ole westerners, and any other zippidy do da .277 caliber super gun.
Tell me, what can any of them do that the .270 Winchester and the 270 Weatherby Not Do? Keeping in mind that action length has nothing to do with this discussion. As the OP implied, they all seem to be answers to questions never asked. And, there really can be only one super success story like the .30-06, (early 1900’s) the .308 (middle 1900’s) and the 6.5 Creedmoor (early 2000’s) per lifetime.
* and don’t tell me about the .270 Ren. That thing is deader than any doo doo and can’t hold a candle to the 300 Whisper/Blackout