Gonewest: in my gun I'm getting 3125 fps with that 59.5 gr. H4831 and 130 gr. Accubonds. My wife's gun (exactly like mine) gets 3175 fps. Go figure....guess that proves not all chambers are the same dimensions.
My supply of the old H4831 went bad around 10 years ago. I had a 8 lb. "paper" container and that may have not been the way to store it. Oh well, I got it pretty cheap and was great while it lasted.
I also had a load for the 270 with 160 gr. Nosler Partitions and 55 grs. of the old H4831 that was quite accurate. Don't shoot that load anymore as I've picked up a 7mm WSM
for those 160 gr. loads.
The only bullets I've used have been the Nosler Partitions and the Accubonds in my 270. I am looking at the tipped TSX's now that "unleaded" is creeping up in several hunting areas. My friend loves them in his 270 and says they're very accurate.