I have a good load for the 130NP 55/IMR4350 (3078FPS) according to the manual @3.20 COL and I loaded up with 57/H4831 for the 130SST (2999 FPS) according to the manual to see what happens. Which powder did you use???727, seldom do any two rifles like the same exact load. This load was for my Wby Vanguard .270 Win with 24" barrel, Nosler brass, Federal 210M primers. Started at 56gr and worked up .3gr at a throw, found 57.0 was the most accurate. Can't guarantee 57.0 is your number, but should be close if all factors the same. Addition: After seeing your other post I might add with a Nosler partition or accubond this load would need to worked up from scratch.