H4831 was/is a benchmark powder in the .270. I've used IMR 4831 in all of the .25-06, .270 and .280 and found no real advantage over H4831 in all 3 ctgs, so I set it aside and stayed with H4831.
For a .270 IMR4350 and H4831 are about as far as you need to look. The old W785 was very good as well.