I can't help you personally, but here are a few articles I've dug up in the net. Like the first article says, moisture readings can be difficult to interpet at best and unreliable at worst.
Moisture Meters on Boat Hulls:
Do They Produce Reliable Results?
By David Pascoe, Marine Surveyorhttp://www.yachtsurvey.com/moisture_meters.htm
The Use & Misuse of Moisture Meters = http://www.marinesurveyor.com/meters.html
Another forum said that their surveyer said anything under 17% is acceptable. That's heresay of course, but worth checking out what is an acceptable reading.