If I recall, ILya said CA was pretty bad with the M7Xi for the price, I'm going off that as well as a local friend who had one and was not impressed compared to Schmidt and Minox ZP5. At some point I'm going to have to try and test one out to see for myself, I really like the FOV and mag range, the MSR2 is decent but not my favorite.
On the M7Xi I have here, CA on high magnification is fairly prominent. Someone is going to send me two more M7Xi 4-28x56 scopes to compare next week.
Overall amount of CA is somewhat similar to the 5-25x56 Kahles I looked at. Maybe a touch more. However, in other ways, M7Xi is very nicely worked out. Distortion is well controlled. FOV is good. Eyepiece is very easy to get behind.
There is a lot to like about this scope and it is a step forward from M5Xi. It is not for people very sensitive to CA, but for everyone else, it is a very interesting choice.
I am not crazy about reticle selection, but MSR2 is very workable.
I am really looking forward to the smaller 2.9-20x50 M7Xi.
ILya