Kirk,
I actually saw a few boxes of .257 Roberts ammo on the shelf of a local gun store today!
Apparently you don't know that my family (not just me) has been shooting the .257 Roberts since 1953. I believe you were born that year?
Three generations have taken pronghorns at over 400 yards, really big whitetail and mule deer bucks, and several cow elk with the .257. In fact I killed a pronghorn at 350 yards just a couple years ago with the family heirloom .257. It works! (Oh, and Eileen killed yet another cow elk a couple-three years ago, which dropped on impact.)
Good to hear, once again, both personally and on the Internet, that you know everything about the 6.5 Creedmoor, despite never having fired one.
