Im a little dense, but you are implying your cutting drinking caused your BP to go back to normal. Did you stop completely?
But completely stopping alcohol consumption, with no other lifestyle change, brought my BP to rock solid normal.
Crap! (for me-I am happy for you)
There was another factor...moving from a 'blue state' or a 'blue region' like Soviet Red England to a 'red state/region' can lower your blood pressure, as well. :-)
I expect mine to drop twenty points on both ends when I leave Red Hampshire for Tennessee. The daily feeling of nausea in the pit of my stomach will disappear, as well.