150 gr Nosler B/T with 73.5 gr of IMR 4350 gets me about 3350-3360 fps
IMR 4831 is also suitable for velocity but not in the gun I reload for.

I donot load for 125 gr bullets but the Nosler book says RL 19 and H4831sc have the best velocity.

125 gr B/T load info

RL19 77.0 gr min 3309fps
81.0 gr max 3500fps

H4831 sc 80gr min 3362fps
84.0 max 3521fps

hope this helps