We did use MBUS irons, Geoff shot irons at 50 after a 25 yard zero, POI off the same as his RDS.

His unit was not off exactly the same as mine. It was not only a little further off in windage, but elevation varied as well on that one. Once we set the zero, 25 yards first, we did not adjust the red dot, merely fired for group. Then zeroed at 50 and shot at 25 for group.

Both barrels were accurate, so something is out of square with the axis of the bore. I'm not sure what it is. If their gunsmith is aware of this type of problem, they have seen it before and hopefully can fix it. I would like to not only have it fixed, but I want to know what the issue is.