HMMMM!!Guess I've always taken it for granted but the purr was one of the easiest calls I was able to produce on a mouthcall and I've taught quite a few friends since!Idaho theres a time to be loud and a time to be quiet through the course of a hunt and you'll eventually learn both with experience!It only makes sense to have your hands free when that gobbler is in close as you sweet talk him in with a mouth call!I've harvested alot more than just a few gobblers this way and so will you with a little practice.Its exciting to high ball a red hot bird in with those aggressive type calls if you can find one,but todays woods unless your on private ground have alot of hunting pressure with call shy birds and in alot of cases those high octane calls keep Mr.Gobbler quiet!!Learn those contentment type calls on your mouth call because I guranttee in the long run when ole gobbler is hung-up out there at 60 yards a little encouragement in alot of cases is all it takes...Bob