I have killed a few with the .257 Roberts and so has my son. I have also killed several with a 7mm/08, and a couple with the .270.
I will always have a soft spot for the 7mm/08. It is a great cartridge. That said, the .257 seems to kill as good with less noise. It also kills deer as well as the .270 does with less recoil.
One of these days, I will stumble on a Winchester featherweight in .257 Roberts, and I'll bring it home. I have found that I don't care for a short action roberts for my own purposes, and then I'll be all set.
Good luck.
