Many years ago a customer bought a ch x ch chessie because he said that the owners said they hunted them. (which can often mean that owners take their dogs hunting and not that the dogs actually are good at it) Anyway the dog had 0 prey drive. He might as well have bought a goat.
And as far as trainability, I obtained mine from a breeder known better for producing show dogs than gun dogs, but my instincts and previous experience with Chessie's was right: Pretty much every Chessie is going to hunt. You may get that with a show bred lab or golden, but you most certainly willget it with a show bred Chessie.