RWS-50 and Eley Match is what I feed my MK-II and I shoot it at 109 yards only so all I can say is that those 2 types of ammo average about 1 moa.

I've had plenty of 5 shot groups around 1/2 moa and a few sub 1/2 moa, but when I average all the 5 shot groups I've ever shot with that ammo it would be about 1 moa at 109 yards.

109 yards (100 meters) groups

RWS-50 or Eley Match (can't remember which one on these pics)