Bob I bet tons of H4831 got burned in the 30/06, and other cartridges for which it was not exactly optimum, mostly because it was abundant, available, and cheap. They'd stuff it into everything..
The 270 will swallow everything from 4064 to RL25 IME with the medium-slow to slow showing best with bullets 130 gr and up.
I've only used R17 in the 270 with the 110 Barnes where it did well. I'd expect the powder to do good in the 30/06, the 338 Win Mag, and likely the 375 H&H as well.
Personally I defaulted to H4350 in the 30/06 with no reason to change so far.
