I'm a strong believer that air-dried black cherry can make awesome core wood in laminated bows, whether in a trilam or a glass bow. Not sure how chokecherry compares, from what I've read it should be similar.
I've tried messing with some cherry from the lumber yard, and it was very brittle. I'm thinking it has something to do with how they dried it and when they steam it to make the color more uniform. That's why I think air dried is the way to go for cherry. The stuff I've cut and dried doesn't break very easy at all. It's not hickory, but it's still tough.