Have to taken a ring that check .020 in one bore and tried in in the bore that came .024?
Have you mic'ed the cylinders to make sure they were at proper size?
Or are you just assuming the machine shop got it all perfect.
For every .001 you open the the bore, you gain Pi, 3.141 on your ring gap. Think maybe that one cylinder is .0013 over size?
Personally I think your .017/.019 is a tad tight for 25psi. Unless you really know how to tune.
Read this thread, what I said in post #25 would also apply to you.
Piston clearance need help asap