I have raised border collie cattle dogs for years! I have tried to breed the traits I wanted in them hard bite, trainable, walkup power, and keep herding instinct with brains. In saying all of this if I got 40% of a litter to do this I thought I was successful. It seems to me that good hunting dogs would not be any differant, But so many times I hear people say all the pups in the last litter were great hunters. In my opinion a pup is a gamble no matter the parents. I like to buy a pup at an older age so I can have an idea if it has what I'm looking for.
If 40% was your target mark, you have low standards in my opinion. Not bad mouthing, just stating my opinion on an open forum. Your 40 % may lead the breed for all I know.