I bought the 270 wsm...why?...I could not really tell you other than I wanted a new gun and I wanted to try a wsm. I looked at the 270 wsm and the 7mm wsm and the 270wsm is just easier to find. That includes rifles and factory ammo. Now if you consider the 7mm rem mag then it is definately more popular than the 270 wsm. Personally the 270 wsm will take anything that I will ever hunt. If the 270 wsm won't get the job done, then you probably need to go to a bigger bullet than a 7mm.