I found another thing to like about PR3s, they hold air! In two months I haven't added air and i'm down 2 PSI. Better than any tire I've used before.
I'm finding the same thing. I asked my tire guy on the second set if he was doing anything different such as shooting nitrogen in them, cleaning the rim walls better or just anything because I've never had motorcycle tires hold air consistent like these. The very slight difference in mine I attribute to climate/temp change.