It might not only be the prop thats cracked, there might be more damage closer in near the hub.
I remember about 3 or so years ago now there was a 210 that hit a dog (ok so more than just a chip, but still dealing with props and uncurtainty), after a few tests by the pilot he flies the plane and on shut down one of the blades ended up fully feathered, on a 210 it's not a good thing. The pilot was very lucky to land.
My money would be on making the call to LAME.
