H748, Bl C2, 4895. Might even try 4198 with light (130) gr bullets. (works great in the 300 Savage & 308).
Sure you're aware a short barrel on a long action and case with the capacity of an 06' are not a match made in heaven.
Depending what the action is, there may be many takeoff 24" barrels out there at a low price. Then you could use the 4350 which is IMO the best 30-06 powder.
Good shooting!