You've combined a number of factors in such a way that your range is expected to be dismal.
To get a much better estimation of range, look at the numbers on the Energy page. It shows something much closer to reality than the number near the speed.
- Your location shows as "The North" so that says cold, and your indications that temperatures were at freezing confirms that. You can probably take away 20% or more just for that.
- Turning the AC off once it reaches temperature doesn't do any good, you've already used the energy. But that's not a big factor.
- You didn't mention which car you have, but if you don't have the 18 inch wheels with the covers on, you can subtract another 5-10%.
- Going 72 mph also subtracts another 20-30%. Once you start to go above 50 mph, you are going to drop below the rated range.
It is not another 20-30% hit for going 72 mph. Maybe 10%. He got 28% below EPA on an AWD in the cold going 72 mph. That’s Pretty good and sounds about right to me. Not sure which tires he had.