Re: .308 - Lapua or Winchester Brass? Factory FGMM or Handloads?
My thoughts are that win brass SUCKS. If you dont want to fork the coin for Lapua brass, Remington cases have been very good the last couple of years. You still need to de-burr the flash holes etc....but the consistency from case to case and lot to lot has been very good. I do like the Lapua brass quite a bit but since the price for 100 went from 35 bucks to 80 bucks, I am not sure I like it that much more than the Remington brass.
As far as GMM ammo, it is good stuff. I never had any luck with the 175 GMM ammo despite having great luck with the 175 in hand loads and the 168 GMM ammo. The best thing here is to try it and see if your gun likes it. Personally, I like to hand load. I can fine tune a load and use other match bullets such as the 190 SMK which in my opinion is a much better 308 match load than the 175. The 208 AMAX is even better.
Hope that helps!
Long range shooting is a process that ends with a result. Once you start to focus on the result (how bad your last shot was, how big the group is going to be, what your buck will score, what your match score is, what place you are in...) then you loose the capacity to focus on the process.