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I’ve not watched any, but would take a wild guess and say visual aids played a part in some of their successes.
I used to cringe at some of the calling until I listened to my own. If it took great calling with a lot of different vocalizations, I probably would have to sneak on turkeys. I basically use one vocalization, yelps. Soft yelps, loud yelps, fast excited yelps, etc. I throw in a few cuts every now and again for good measure. I am hunting dumb and easy Western turkeys, so maybe that's how I get by with it.