I'm thinking the IMR4227 in a 308 with a 150gr bullet should reach about 2,250 depending on barrel lenght and fast rifle/slow rifle syndrome. I haven't tried that combo but will. One of the 4198's would be the next progression in a bit slower powder for a touch more velocity in my mind.
If the SST bullets have been beefed up I'm thinking the 160gr FTX for the Marlin express may just be a good substitute. The 30-30 version of that bullet seems to be pretty soft when shooting targets of opportunity but I have no experience with it on game. The Version for the Marlin express is a different bullet than the 30-30 version appearing more like the SST profile with a little more pointy gummy tip. It may be just the answer for good performance on game in a 30 caliber in the 2,200 to 2,400 fps window? Anyone have any on-game experience with this bullet they would care to share?
Rick