H-4895 is the best for reduced loads.
You can go as low as 27 gr of H-4895 with 150 gr bullets in the 308 which should yield around 1,800 fps from a 24" bbl. 27 gr would be the bare minimum with 150 gr bullets, and you can go up in charge weight until you get to max published data.
Check out Hodgdons H-4895 reduced loads rule....
https://www.hodgdon.com/wp-content/uploads/2016/11/h4895-reduced-rifle-loads.pdf

You can go as low as 27 gr of H-4895 with 150 gr bullets in the 308 which should yield around 1,800 fps from a 24" bbl. 27 gr would be the bare minimum with 150 gr bullets, and you can go up in charge weight until you get to max published data.
Check out Hodgdons H-4895 reduced loads rule....
https://www.hodgdon.com/wp-content/uploads/2016/11/h4895-reduced-rifle-loads.pdf
