I’ve gotten excellent results with it in the 6.5 Sweed and am getting a couple of loads dialed in with the 6.5 Creedmoor and 30-06.
What bullet are you using in the .30-06?
Worked up a new load for my NULA .30-06 last month, using the 175-grain Barnes LRX. Among the powders I tried was StaBall 6.5, because Hodgdon's data lists it as getting top velocities in that bullet weight-range. Velocities were pretty fast, but accuracy wasn't great. IMR4451 did well in both.