[Chuck Heald]

Dean,
I don't think it's so much Repro stocks that are susceptable to breaking, but rather whether or not the grain is lined up well.

Claro, black and english walnut all have a good success history of bending.

I haven't really studied Repro stocks, but possibly there are a lot with less than ideal grain in the wrist? I did note that there were a number of people that have broken the wrist of a Repro.