Hornady has data for their FTX, note the remark about case length, also that most loads are below what data for conventional 150's and 170's suggests. The FTX has more bullet below the waterline than standard 30-30 bullets... less case volume.
Hodgdon also published data on their sight that includes their LVR powder.
If hunting is a consideration there is a point where the advantage spitzers have on paper may only be on paper. ie at 200 yards the old FP at 1600fps will work but the spitzer at 1900 may not expand well. Except for the FTX, I'd consider Nosler 125's or 150's the max for reliable expansion downrange.