I had a Ruger 7ts 257 Roberts, rechambered to AI a bunch of years ago, and have shot quite a few deer and some other varmits with it, using the 100 gr Hornady at 3130 mv. This combination really works for me, but if I were going on a Sheep hunt I would use the 115 gr Nosler PT, and never have a second thought. The standard 257 is no handicap.
