As a matter of fact, I took my M1A out of the safe a couple weeks ago and worked up some new loads using some Nosler 168gr CC. With my hand loads, I was getting .88MOA.
With USGI M118, I was getting .58MOA. I didn't include the last shot in that group since the wind blew my target over as I fired. I declared that shot a "range alibi"
Including the last shot, the group comes in at around .9MOA
Each group was fired at 100 yards off the bench with a front rest.
Now for the embarrassing part...
I was shooting my loads for group size and was having the weirdest results. Nothing would group less than 1.5 MOA; not even 168gr FGMM. I must have fired about 40 rounds of the rifle when I realized that I forgot to torque down the action screws! DOH!
Afterwards, group sizes shrank considerably.
Here's a pic of the old girl
I haven't shot the rifle in quite a few years but she would reach easily reach out to 600 yards. I tried to look for my old data books to see what kind of accuracy I was getting at that range, but that info has disappeared with the sands of time.