I learned this season that no matter how close a bird already is you have to get as close as possible to have any effect on his travel route. I guided this spring and in 22 days my hunters killed 17 birds. I understand that this may be the only "huntable" bird in the area and the closer it gets to the end of season you need to become more aggressive. I've always heard get to at least within 100 yards when they're on the roost. That was BS this year. If you weren't within 50 yards you were going to listen to him all morning. Get in his face. Its very important not to call at all walking in to him. Take a few steps and listen for a gobble. During the midday hours if a bird gobbled we would get within 100 yards or closer if possible before I would even call. Get close, call soft and be patient. Try a different call too. Last year birds in KY liked the high pitched young hen talk. This year they would even stick their heads up when they heard it. Good luck.