Re: Moa at 400 yds?
You can get better accuracy with the AR 308 platform, and for less $$. The M1A is a fantastic battle rifle and in the NM or Supermatch form they can be MOA or better, where you start to run into issues with the M1A is when mounting optics. I owned a few Springfield Supermatch rifles, loved them but they were MOA one day and 1.5-2 MOA rifles the next, and I never could get a mount that I had total confidence in not coming loose.
Kirk R