Either of those would be fine and you might also consider a 260 or 280 Remington. Any of the above would allow ~350 yard shots and still carry enough energy to get the job done, at that range.Looking to add a gun to my collection for "longer" range shots on mule deer and antelope. I mostly hunt the plains of colorado, so shots can get long at times. I was looking at a magnum caliber such as a 270wsm or 257 weatherby. Any advice?