I would just focus on working up an accurate load that functions within the cycling parameters first. Sometimes it's frustrating when everything is at least reasonable in terms of component selection and the results are no better than inexpensive factory ammo - like 2.5 to 3 moa. I wouldn't limit yourself to only forum advice, it may take some trial and error since 308 semi's are finicky in terms of finding an accurate load that cycles.
As others have said and I can attest, the thought of "fast powder for short barrels and slow powder for long barrels" is a myth. Try various powders. The old standby of various flavors of 4895 usually work well. IMR 3031, IMR4064, TAC, CFE 223, Varget and others can work well also. Something that I ran into when trying to reload a 308 semiauto is that I could get good accuracy with one powder, but the charge weights to attain it were at the top of the data, meaning flat primers, rough extraction, etc. Another powder worked reasonably at low charge weights (near the minimum load) but it didn't get the velocity.
I also wouldn't limit yourself to 150-155gr. It's possible that your rifle may not like them as well as others. An experiment with 125gr were accurate near the top of the data, but loosened up my carrier key. 150's and 165's just weren't impressive in my individual barrel. I was about to just give up and accept that it was a 3 moa rifle until I tried 180gr with IMR4895. While it will never be a tack driver, that combo achieves the accuracy portion, but would not meet the OP's fps goal.
Sometimes, we get spoiled with how easy it is to get an accurate 223 rem load in an AR-15. It doesn't always translate into other calibers and firearms.
