I never said it would kill anything faster than anything...Where is your excitedness and measuring contest coming from? Nobody yanked your chain and downed your suggestion.
Re-read my post...I simply stated which one I would pick. I never mentioned any other calibers.
I have a .25-06 AI project I'm working on at the moment, and have owned, and been killing deer with my .257 Wby since 2008. I've never had any issues.
And while dead is dead, yes the .25-06 AI and .257 Wby will kill the deer faster than the .257 Roberts....About 600 fps faster.
The .257 Wby only uses about 70gr of powder for my loads, and I'm hitting 3,400 fps with the 110 NAB's. Last time I checked the .25-06 uses 50-60gr of powder... The .257 Roberts might use 40-50gr of powder.
Nosler custom .257 Roberts ammo with a 110 NAB is 3,000 fps MV.
Nosler Trophy Grade Ammo 257 Roberts +P 110 Grain AccuBond Box of 20
.257 Wby Mag factory loaded ammo with a 110 NAB is 3,460 fps....Almost 3,500 fps. And it can be loaded hotter when handloading.
Weatherby Ammo 257 Weatherby Mag 110 Grain Nosler AccuBond Box of 20
We won't even get into the .25-06 A.I. simply because that will hurt your feelings (over 3,500 fps), so I'll just post some Doubletap .25-06 Rem ammo with the 110 NAB's, which is 3,250.
Doubletap Ammo 25-06 Remington 110 Grain Nosler AccuBond Spitzer Box
After reading your entire post...What is your hang-up with hating the .257 Wby Mag? You seem to suggest every other 1/4-bore out there EXCEPT the .257 Wby Mag.
And for the record both Redding and RCBS keep .257 Wby Mag dies and .25-06 AI dies in their catalog.