I've posted this info before, but my tried and true .257 Wby. load for my Wby MkV is:

72.0 gr. of RL22, Barnes 100 gr. TTSX, Wby/Norma brass, and CCI 250 primers, for a MV of 3700 fps. Very accurate.
[Linked Image from i.imgur.com]

I'd rather be a free man in my grave, than living as a puppet or a slave....