Wolf Killer:
Use Norma MRP. Go to
www.norma.ccBlack Hills sells Norma Powders. I have a .340 Wby Mag., and I push a 250 gr bullet 3,062 f/s using 88.5 grs of Norma MRP (Don't forget to start
MIN.) If you need data let me know I have a Norma booklet, and it has a page just for Weatherby calibers. Good luck.