Right now I'm shooting the 100 grain ttsx in my 257, I like it just in case a deer shows up closer than anticipated. I've had really good luck with the 115 Berger and have killed deer with Sierras, Hornady, Noslers.
It's usually like turning off a light switch when hit with anything out of the 257 Weatherby. I didn't like the 110 grain Accubonds, killed two bucks and they were the only deer that I've ever had take more than a few steps when hit with the 257.
Most people like them though.