I once would have picked the 270 wsm but after reading data from Hornady # 6 on the 7 WSM it is something else. There is not enough difference between a 270 win and the wsm to make a difference but in the 7WSM its another ballpark. 3300 fps with a 139 grain bullet is pretty darn good for a short action with a 24" barrel. I had the Abolt SS in 300 wsm and a Model 70 w/24" barrel and there isn't any difference between velocities especially with factory loads.