Why does a call have to be called a "buck growl" to produce the call. Personally I can imitate it on both the River Valley Game Call's Deer Flute and the new Signature Series one as well. Hell I can pick up my Woods Wise, my True Talker and my cheap Bracklyn call and also produce the sound...save your money, don't wait for Primos....then again, I doubt I use the "buck growl" in my calling sequences anyhow...just a couple grunts usually does the trick, couple it with a contact call.