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For those who know such things (Formidilosus), with the "IHR" having reference points at 3 MOA and 6 MOA is that not useful in windage holds at hunting ranges. Many recommend the Mil Dot but that is a courser graduation than the IHR, 3" vs 3.6".
Don't get me wrong- the IHR can be used quite well It's just that compared to other options it's painting you in a corner. The reticle isn't just used for holding off. One of the greatest advantage to a matching reticle/turret system is the ability to use the reticle as a tape measure and adjust for impacts on the fly.
Don't think in "courser" graduations. Think sequential. The IHR is a reticle that has marks (though visually different) at 3 and 6 moa and adjusts in .25moa increments. Yes, you can crudely try to guess in between those increments or extrapolate an adjustment based on this increments, but it's not intuitive.
A mil reticle is based on tens. You visually break down each mil into tenths. Pared with .1 mil scope adjustments, what you see is what you get. Visually and mentally "tenths" make sense to humans. For instance- you see the shot go low left, and your brain registers that you need to go up .7 and right 1.3 mils.
From teaching hundreds of people to shoot, quite a few of them diehard MOA users, NO ONE goes back to anything but mil/mil.