I just started working on a .270 load with StaBALL. So far, so good...
Ruger American bone-stock rifle.
140gr SST, CCI200, Win brass.
Ran a Satterlee from 54.0gr to 56.0gr in .2 gr increments. Zero pressure signs, will likely try to get my magic 3100fps out of it.
Best nodes were:
2951, 2950 & 2951 at 54.2, 54.4 & 54.6grs.
2979, 2976 at 55.0, 55.2grs.
Velocities ranged from 2945 to 3065, no wild jumps or dips.
Satterlee data =
2945
2951
2950
2951
2968
2979
2976
2999
3042
3056
3065
Some of these weights are above published MAX for a different projectile via Hodgdons web data.
Data currently sucks...I'm just glad I found a use for this powder. It did not perform as well as H4350 or VitN555 in my 6.5 CM LR setup.
Best of luck and hope this helps.