The .257 roberts is a great cartridge, but it does do better in a long action, especially if you want to shoot the longer, heavier bullets and seat them close to the lands. IMO if you want to fire a .257 bullet in a long-action rifle, you are making better use of that action with a .25-06. Ammo/brass is a little easier to find, and the extra 200 fps doesn't hurt either
