Going to have to agree. That sounds more like a calling technique problem than a call "sound" problem. Custom calls are nice, I own MANY. However, truth be told if made to I am fairly well certain I could kill turkeys per normal using calls from Wal Mart. Yes there is more variety and even more relistic sound available in some custom calls, but that really isnt what makes that call bring em in or not. Might be the spark that lights their flame but if you got em gobbling and coming, its what youre saying to them or your set ups that is making them stop.

Id be inclined to gamble that its a little of both. If you keep seeing them hang up at 70-80 yards take a look around. Why did they stop? Are you 100 yards across an opening? Were you 80 yards out from a tangle of brush or blowdown? How bout his callign to you? Did he go silent at 150 yard gobble once at 80 and then you never see him again? Did you panic and start making alot of calls and in the process alot of movement? You do know a bird at 100 yards can see you blink.

Go out and get yourself some custom calls. They sound great, look great, and are a pleasure to carry. However I dont think thats what hurting your chances today. I second the leaf scratrching, its absolutely deadly. Combine it with a cluck and its almost a sure bet for any bird thats gobbled all the way to 100 yards. From that point its all about set up. Look at your set ups and give yourself the best chance of intercepting that bird. Be able to shoot where he will be able to see the hen!Thats where he stops.