Take Aim at Rifle Reloading Data | Hodgdon Reloading
https://loaddata.com/articles/PDF/LD-36 Haviland LR.pdf
Have used trail boss successfully in 308, and Hodgen lists a 150 gn bullet load in it's on line data base. If you can use it with 150 grainer, would ask them directly about use with heavier bullets.
