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You get any turkey hunting master in the woods and they know how to make any call work to their advantage. I personally prefer the clearer sounding calls from a yelper simply because I have plenty of other calls that are raspy. I have also noticed (or it may be my imagination) that turkeys seem to respond best to soft and simple. The range at which a turkey can hear a yelper (Wingbone, cane or trumpet) played softly continues (after 30 years) to amaze me.