Doughboy,
Keep the shock collar in the dresser drawer.
I gotta agree with Hunts and Reba on the collar....( Boy could we light up a thread about pros and cons of Ecollars??? Don't want to do it though.)
I have not done as much gun dog training as other forms of training, so take this FWIW, but one of the first things I teach a dog, any dog, is the word "stop". It is to be taken literally and applies to ALL instances. Stop means Stop.
I start it with their food dish, put it down, when pup is about a nose away, just restrain him by flank or tail and say "stop", extrapolate the concept up and out from there.All training is incremental, approach the steps slowly... As in all other forms of training, when he does what is requested,he needs IMMEDIATE positive reinforcement, lots of it!
As you work up to the leash, then a long lead, keep extrapolating, Stop him with the lead while saying "stop" and reward him big time when he does. When he doesn't, its simply game over, no negative reinforcement, no aversives, just no more fun. It takes longer this way, but lasts longer. Ultimately in the field when he ranges too far, you say "stop" or whistle or whatever your version of "stop" is, and when he turns to you looking for further instruction, give it to him, recall, right, left, whatever...
Also FWIW I have found the ONLY time you need to raise your voice in dog training is during the whoop-it-up-reward-time...
As HUNTS said, keep some treats with you, whenever the dog does as you ask, make it worth his while....
Ingwe