Re: Bullet selection for a new 308
Any of those listed are good bullets, just depends what your rifle prefers. The factory Rem 700 chamber is often long, so seating lighter weight bullets out near the lands is a problem. If you're lucky, it will shoot well at the standard 2.800 OAL.
The original Sierra 155 gr MK #2155 can be seated out near the lands and works good but won't have a lot of neck support if loaded that long. The newer Sierra Palma 2156 profile is more pointed, (A-Max also) and will have even less neck support if seated near the lands - unless your chamber has a short throat. If that dose'nt work out try the 165-168 or 175 gr.
Get some 155 Sierra's (2155) Varget, 4064, or 4895, load to around 43 - 45 gr with standard rifle primers and give her a try. Load some around 2.800 and some closer to the lands and see what works best for you.
The 308 is probably the most published round out there, so do some on-line checking - you will see the same loads work for most people. If you have a good barrel, and bedding, trigger, etc, are good you should be able to get 1/2 MOA or better from that setup.