DougTake a caliper to the master link and compare width from plate to plate to the other links. Also measure the width of the riveted pins, should be 5.5 to 5.8mm. At least you can rule out the master link as the cause if in specification.
Your tolerances I believe are for a DID chain.
Mfg dimensions vary a bit between make and model, and from the photo you can't tell which mfg other than the type of stake.