Quick Load shows a 129 grain SST in 22" barrel, 3.400" COAL,
52.0 grains of H4831 as max @ 2750 fps
48.0 grains H4350 as max @ 2730 fps
48.3 grains IMR 4350 as amx @ 2760 fps
Again, these are max listed loads from QL, which will get you in the ball park. Work up to these charges, and do not start at max. If you want a different powder calculated, let me know.