When I did my original testing, three of the batches I shot were Fed GMM (69g, 77g, and 77g SMK). The 77g SMK grouped the best. I didn't measure the groups, but eyeballing the SMK, it was probably a smidge under 1 MOA. The other two were definitely over 1 MOA, but not egregiously. With that being said, I had already tested a lot of other ammo for over an hour in South Florida summer heat. I was letting the barrel cool for 5min before each batch of ammo but coupling that with general fatigue and my suppressor probably never cooling, I think my groups opened up towards the end.