Sounds like zoom ring slop.

The reticle is likely fine.The discrepancy can come from several places. And it applies to all scopes, not just Hawkes.1st question is where are you taking the distance reading from? I take my readings from the second focal plane, which is near the erector tube gimble. The magnification ring on the scope is a good external reference for measuring distance to the target. If you do that, you might get closer to the expected value when measuring close targets.Also, the markings on the magnification ring are often inaccurate.Adjust the magnification until you get the dot spacing that you want, and then mark that location on the ring.For me, I don't worry if the dot spacing is exactly a milliradian. I usually make up a dope sheet specific to each scope at the magnification that I prefer to shoot at. That makes exact milliradians irrelevant.

Mrad is a metric value, it don't messure yards.

QuoteMrad is a metric value, it don't messure yards.A Milliradian (MRad) is an measure of angle, it is neither Metric nor Imperial measure.... It is by definition 1/1000 of a radian, which is the angle where the length of arc equals the radius.... One MRad is therefore 1/1000th of the distance to the target.... That could be 1 metre at 1000 metres, 1 yard at 1000 yards, 1/10th of a yard (ie 3.6") at 100 yards, or 1/10th of a metre (10 cm) at 100 metres…. It would also be 1 cm at 10 metres, etc.etc.etc….Bob

I will not warranty it. Math to correct it is very simple.It can be taken as 10%, trivial to calculate. 3 mrad corrected at 2.7 mrad as example. 1% on my distances are very small values.I only wonder is my with a mistake, or this is design failure.Sidewinder tactical series are all caliber rated. They already offer too much for a value they are sold. Great value for a money spent. All caliber rated scopes in that price category offer less then Hawke.Perfection cost few thousands USD in a category sidewinder tactical is. But it cannot but put on a magnum springer air rifle :-) Hawke offer even that. :-)