Yes! And it's a trip too! You'll hear their grunts bounce off the canopy of the oak you're sitting under and can kinda gauge how many and how far away they are.
But so far I've only heard just little "Hey, is anybody there?" / Locator grunts. Or perhaps they are "C'Mon Baby, gimme a lil sugar!" grunts, I don't know for sure.
I've called-in 2 using the Grunt call. One was big for that area. Still uber upset with myself for missing him twice with my bow.
The Primos Uproar. The kind with pinchable soft rubber bell so you can make it nice and soft and non-threatening if you want to be very subtle and not spook 'em if you think or hear that they are closer by. Just invoke a lil curiosity. I do think it has to be the right time of the year though for them to work. I used it very sparsely. Maybe 3 blurps... each single one 1.5-2.0 min apart. Followed by 15-30min of silence, or more.
Was soo exciting when that 3x3 came sauntering up the gullie!
YMMV.