Blue Heeler dogs are mainly used as working dogs on farms and help to herd livestock, cattle, sheep etc so they are better at herding than they are are hunting and retrieving game during hunting.
Although if you train the Blue Heeler dog properly then they can make great hunting dogs.
My friend who I go hunting with at times has a Blue Heeler and he was able to train that dog to go hunting even though I thought it was not possible.
After the training that dog does an even better job at retrieving game during hunting than a Labrador Retriever but he could be the exception.
Still I've heard of some more Blue Heeler dogs being trained to be hunting dogs so it's possible.
Most times though people use Labrador Retrievers and setters and pointer dog breeds to hunt with.