Hello from Georgia,
The Lee manual lists 150 gr. bullets to be loaded with 44 gr. to start and 47 gr. as a max load. I have tried several powders in my Ultra Hunter .308 and have found that Varget performs better than IMR 3031, IMR 4895 and H335. Those 150 gr. bullets do perform well and actually make very effective target loads as well as Coyote injections. Good Luck.
Dave