Well the 270 WSM and the 270 Weatherby both just have to be pretty darn good performers because they are supposed to offer improved ballistics to the already great 270 Winchester. However, I question whether it is worth sacrificing the magazine capacity and the super-smooth feeding of the standard 270 for a dubious enhancement in velocity. Hand-loaded, with optimal powders, and a 24" barrel, it is easy to achieve 3,000 fps with 150 grain bullets. I have personal clocked 140 grain bullets to 3,285; admittedly a hot load; I think 3,100 should be about the limit for those. I think, if all rifles wear the same 24" barrel, the regular 270 Winchester performs right with the 264 WM, 270 Weatherby, 280 Ackley, and very close to the 7mm Remington Magnum. A 270 with 130 grain bullets is like an utter death-ray on deer.