Re: 270 win. & 130gr. Hornady SST Load
For the 270 Win my Hornady manual 7th Ed says for 130 gr bullets
H-4831 start 52.3 Max 62.0 grs.
IMR-4350 start 47.1 Max 54.6 grs
I will add that I have loaded for a bunch of 270 Wins and 62 grs H-4831 with most any of the cup and core 130 gr bullets just plan shoots and kills deer size game dead before they hit the ground. Good luck.