Take a few of those rings and "mic" the thickness of the RING. Last year I had a set of rings that actually were thicker in some spots than other, binding the ring. Never saw such a thing. Also, make sure there isnt a little burr sticking in the ring groove somewhere. That is actually quite common to find in new pistons.Just a small nail file and its gone, and the rings will float and clearance properly. Double check just in case. Good luck.