There is no "best" bullet weight.
The .308 is a very flexible round, used in a number of settings. For LR shooting, high B.C. bullets make sense.
For WT hunting, 2-300 yds, I like 130 gr. Hornady. It will blow thru a WT chest with good exit/entrance wounds and bleeding, often DRT. The 130's can be pushed at 3K fps.
For bigger critters, heavier bullets make sense.
So, for a "best" bullet, one needs to specify the task at hand. The answer changes.
IMO.
DF
Have you ever needed to go in or out through a shoulder with that one? If so, how did it do?
We chest shoot deer to save meat.
I've never tried one thru the shoulders, although on a WT I wouldn't bet against an exit.
If I was a hard core shoulder buster, I'd probably go with 130 gr. TTSX's at 3,200+. My .257R, shooting 100 TTSX at 3,200 is a proven and impressive killer.
DF