Most .308 Winchester chambered rifles will shoot well with a variety of powders and bullets, the Sierra 168gr,HPBT is a great bullet for distances out to 600 yds, if you shoot closer its little brothwer the 155 Sierra HPBT Palma is eaiser on the shoulder shooting long sessions of step up loadings. If you want a hunting bullet for whitetails the Nosler Ballistic tips are the way to go.
As far as I'm concerned two of the best powders for the 308 WIN. are Hodgdons Varget and Aliants RE 15. I have had luck with both the RE15 seems to work better withthe lighter bullets from Hornadys 110 gr VMAX Varmint to Nosler 125gr Ballistic tip (green), but the Varget handles the 155gr Palma the 165 gr SPBToffered by just about every manufactuer, and the 168 gr Match HPBTs ditto.I havent shot any of the 175 grain HPBT's, and the 180 gr RNSP Woodleigh with a stiff load of Varget will sure knock the dust off the biggest Elk,Moose or Blackbear !
The Federal GOLD MEDAL Match Large rifle primers give the best consistancy inany loading I have shot, and I like the winchester brass.
To be truthfull it is really hard to find a loading that most .308's won't shoot well, and quite a few will reward you with small one ragged hole 5 shot groups .
My favorite light loading is 125 gr Nosler Ballistic tip 48grs Varget in a neck sized Winchester case with tht Federal primer I listed above 2.80" COL. Gives a little more than 3100 fps out of my 26" 1in10 twist Ruger MKII Target, it's easy on the brass and shoulder, works good out to 200, any thing over that and I like to move up to the 155-165 then 168 class.