fredIII, Yes, group size is measured center to center for this. Those .308's are hard to tame aren't they?
tex_n_cal, Nice shooting. I have been tempted to try the 77 TMK's but have been holding out to see how they perform for others at magazine length. It looks like they have a secant ogive like the 75gr Hornady's so I wonder if they are picky about seating depth.