.... I've never owned a 7X57, but I have owned and killed my share of whitetail with .280 Rem., 7MM Rem Mag and 7MM-08 Rem. Personally, the 7Mag is my least favorite. The .280 Rem. is one fine round, but the 7-08 has become my personal favorite by far... easy to work up a load for and light in the recoil dept. I see no reason to even consider a change for my go-to deer rifle. Lots of good factory ammo out there for it if you don't handload, also.