I agree with not overcalling...at 50 yards, almost any calling is overcalling...but when you are still in the process of locating a bird, I think that you should call frequently so as not to miss any potential takers. If you are lucky enough to have access to enough land to "run'n'gun", consider yourself lucky. Many Ontario turkey hunters are forced to hunt turkeys on small plots of land, similar to deer hunting, and the hunt needs to be conducted in a similar way. You get yourself into a good position and attempt to call/decoy the birds onto the land and into range. If your hunt consists of remaining stationary all morning and calling birds, you need to call often enough so that a gobbler who is moving cross-country in search of hens does not pass you by without hearing you.
Once you get a response, then you need to exercise experience and judgment in deciding how much to "converse" with the incomer. You need to keep him interested, but not spook him by overdoing it. Similarly, if you have set up within calling distance of a known roosted bird in the pre-dawn darkness, a few calls to let him know where you are located is all that's needed. Once he's on the ground, the conversation you carry on with him needs to entice him in without spooking him.
Whatever you do, don't emulate the WildTV morons, who always love to shoot a strutting bird. You probably want that tail as a trophy, so don't blow it to bits with a load of #5's. When he's in range, and you're on the gun and ready to go...give him a single yelp, or cluck, or even (my favourite!)..."yoo hoo!" Down goes the tail, up comes the head...bang! Dead bird, undamaged fan, smiles all around.
