IMO, your dog should not be bred from with the jaw she has, I did consider breeding my JRT but even after her jaw grew to be ok it was enough to stop me.
IMO if your dog is a good dog, ie of working ability and nature, then I would cherish that and not put her at risk of any sort by taking pups off her. I know it can be a small risk, but it happens to some out there and my dogs mean far more than any of their pups would.
I also do not see the point in breeding dogs unless they are going to highly experienced homes of people you know and I certainly would not be selling any of my working dogs to a Gamekeeper. I could not live with myself knowing there could be a potential risk that someone may not care for that dog in the way I would or worse case end up in a rehoming centre.
I am too chicken hearted to breed as I think you have to be a bit hard when it comes to breeding dogs.
I would suggest that if you are wanting another dog, I would do your research and contact a successful Pro Gun dog breeder and buy another pup as there is no guarantee that any pup you breed will turn out like their mother