Yes, we might be mixing apples and oranges, how about a bunch of bananas? The first banana is I referred to the 1991 NDS values, unfortunately values for shear parallel to grain have been doubled since 1991. Link to 2005 NDS Supplement
http://www.awc.org/pdf/2005-NDS-Supplement.pdfSorry about that. Still leaves an order of magnatude of difference between values established in the lab and the approved design values.
For clarity, my first post related to the shear plane calc in your second post. It is established practice to use NDS Fv value times shear plane area to evaluate joint strength for dovetails.
