Sometimes .30-06 will like slower powders like one of the 4831s or Re22, but I would expect them to work best with 165s and 180s.
I wouldn't expect H4350 to be much different from IMR4350, but expectations can be fickle. You never really KNOW until you try.
Have you tried a different primer?
Haven't tried another primer yet. I did notice I was shooting Nosler BT's with the Sierra max load so I think I'll try Nosler specific data next. It's over 2 grains less though, which means slower. Basically, I'm trying to duplicate the Superformance speed.