What was your OG on this pak? I recalculated mine three times and recalibrate my refractometer, my OG was 1.071 or 17.3 BRIX. I find it quite off from stated OG. How much yeast did you pitch on that one? I'm tempted to drop 5g. or a little less than half.
Just checked my tilt logs. I got 1.077 and 1.079. Both finished at 1.023. Its pretty common to be low on OG on the big beers. The Picos at its limit grain wise well before and there is a lot of DME. I scoop up the DME that settles out and pour it back in the hole lol.