I've used a power crystal for years and it makes great purrs and cuts really loud when locating. That being said, JoeA hit the nail on the head. Like anything else we can give good advice, but practice and the right call for you will make all the difference. I've turkey hunted since before I could tote my own gun and I still can't purr on a mouth call! LOL!! I have taken more than my fair share of longbeards though so don't get discouraged if there's a certain call you can't make. I'd rather fill my tag than swallow my call! Haha! Anyway, good luck with those turkeys and hunt safe!