Since Saami is 1.1901" as min spec, as long as there is no tolerance delta/stacking, looks like that no-go (at 1.185) might close on a saami chamber, which is not so good. However, the hornady gauge is not as exact as the mansons are in measuring; also your calipers are not as exact either. So there could be some delta in the measurements, that won't show in reality when you put the mansons into that chamber.
Just be aware and see what the chamber actually does with both go and no-go, then you can evaluate what you really have, from there.
Ps, a different thought... do we know if the manson dies were cut for a 0.136 bolt face recess? They should be, but do we know.
Biggest potential source for error is the bushing opening on the comparator gauge, sometimes it sits on more like a 0.351-0.352-whatever line, just because it's not a $200 precision cut tool. It's more of a consistency measure for your barrel, not an exact perfect precision 0.350".
Just be aware and see what the chamber actually does with both go and no-go, then you can evaluate what you really have, from there.
Ps, a different thought... do we know if the manson dies were cut for a 0.136 bolt face recess? They should be, but do we know.
Biggest potential source for error is the bushing opening on the comparator gauge, sometimes it sits on more like a 0.351-0.352-whatever line, just because it's not a $200 precision cut tool. It's more of a consistency measure for your barrel, not an exact perfect precision 0.350".