I started this thread over at the 16s and it is really helpful.
Trying to find out what ammo your gun loves is sometimes as hard as trying to find out "what's wrong" with your wife/girlfriend
I always find it a pain in the butt trying to find out which ammo my new gun loves. Actually the FNAR and Sig556 were my two biggest PITA.
Post up your results and which ammo you used(MFG, Grain, groups at what yards,optics). Pictures will greatly help
Example of the 16s Results:
PRVI, 55gr, see pic,Leup vxI 3-9x40
Hornady 223 75gr tap precision, see pic, Leup VX 1 3-9x40 I ran out of PRVI 55gr to compare
Prvi 55gr see pic, xps 2/Iron sites, 50ydsIt was frigid and windy so don't bust my balls on groups.