Here's what I use and it works for me:

.257 Weatherby Magnum - Deer Hunting Load

Primer: CCI 250 LRM
Powder: Reloader 22 - 64.5 Gr. **MAX**
Bullet: Nosler Partitions 115 Gr. - BC 0.389
OAL: 3.180"
Case Usage: Weatherby (Norma)
Remarks: Lee 2nd. Edition, P.304 +/- 3,200 FPS

Don't know if I'm getting this velocity since I haven't checked it with my Chrony. I have a 24" barrel on my Vanguard. I do know that it hits hard and stuff goes down if I do my part. Dee

"That God could and would, if He were sought."