I' ve had my best luck with a cheap box call by Hunter Specialties (I think, green camo w/ plastic bottom). Gives much better sound that a more expensive box call I have and it always gives of a good sound the turkeys really seem to like (including
THIS bird I shot this spring). Mouth calls seem to give me the wrong cluck or purr some times but I have a few of them too (don' t know the name) that I use for soft little noises or as a backup for the box call to make it sound like more than one hen when calling. That seems to work well too, mouth call and box call at the same time, like a freakin' harem of love-sick hens!