Never used them in an '06, but yes on the 30-30.
Cast loads is where you want to be, shoot and act essentially the same, IME.
Modern Reloading Vol. 2 has a ton of cast info/reduced loads in the 30-06.
Edited by Darkker (12/27/13)
I'm a firm believer in the theory of " If it bleeds, I can kill it".