Like has been said - REPUTABLE Breeders with a history of success don't mix breeds. It's not a 'pure' snobbery thing it's common sense. Hybrid is BS and sold to the uninformed that buy the BS easily.
What does a flushing lab and pointer have in common? Which traits will the pup inherit? What will the temperment and ability to handle prolonged redundant training be?
There are breeds bred well for a REASON!
No offense but that there is a lot of BS thinking...
All dogs that are "pure bred" were at some point or another crossed to take the best traits of two or more types of dog. You think God just plopped a Lab out and said go help out that duck hunter?? All the working dogs we use today were all bred to be the way they are from multiple mutts and then refined into what they are today. Look it up. Labs only became recognized as pedigree in the early 1900's.
Personally as I've mentioned earlier, from my experience, and It seems that is what the OP is looking for, my mutt is useless... but she wasn't bred on purpose, she's a total random. My pure bred lab was a champ.
There are many breeders who are crossing breeds looking for the next "perfect" mutt. If the OP should happen on one he'd be damn lucky in my honest opinion.
I just think it's sad when people refuse to read the question at hand and respond honestly without floundering into bottomless judgement.