I reload the 30 WCF for a 14" contender and experiment with a variety of bullets.
Shooting the Barns 150gn flat nosed bullet the max velocity I could get was ~2150. Using a 110gn bullet I am getting 2500fps with RL7 (both a little more then 1500 ft*lbs of energy). playing with an energy calculator and adjusting velocity to get equivalent energy I would guess you would get around 2350 with the 125gn pill. If Offshore is correct about the minimum recommended impact velocity (I would contact Nosler to confirm) then I think they would work just fine. A ballistics calculator would give you a maximum recommended range to ensure proper expansion. My gut says you would be ok to ~200 yards, but run the calculations.