I have used a Rod Benson grunt tube (available through Cabelas and others) for many years. I have posted to this question before and do so again just to let you guys know about this grunt tube and encourage you to give it a "taste test". Rod Benson is a small time Michigan based company that makes a very versatile, and realistic call. You can move an "O" ring up or down the windpipe and reed to simulateall the way from a fawn bleat on the upper end to an mature buck on the low side. Good luck and Happy Hunting!