Go to powder
IMR 4064 has been my standard .308 powder for over 40 years. Barrel lengths 18, 20 and 22 inches, 150 gr Sierra Pro Hunter for game, 147 gr GI FMJ for practice. Most recent rifle the short barreled Ruger Predator, what a gem!
I use Varget and 175 Match Kings when I shot a wee bit of F -T/R in a long barreled match .308, and a Savage Hog rifle with 180 gr Ballistic Tips uses Varget as well.
Five .308 rifles I'm my safe.