The rule is that not all turkeys will shock gobble all the time to a particular locator call. Remember this rule. Just because you use a locator call and get no response does not mean there are no turkeys around. I have actually used a hoot owl locator call, got no response, and walked in and set up UNDER a roosted gobbler (I forgot my own rule!!) because I felt I was in the right location, even though I got no response. His morning roost gobble nearly gave me a heart attack!!!

While in the woods before dawn I have been set up on roosted toms that did not shock gobble respond to other hunters using hoot owls as locators.

I have sat in the woods under roosted toms after fly up time, waiting until dark to leave and heard " real" coyotes sing for half an hour at dark, and the tom in the trees was silent.

I have blown crow calls with no response the first and second time, and a shock gobble the third, all from the same spot.

My point is that locator calls--hoot owl, crow, peacock, pileated woodpecker, duck, goose, air horn, car door, coyote, hen yelp/cutt, jake gobbling, even thunder (for you gods amongst us)--is not a certainty to produce a shock gobble response every time, and so you must not decide there are no turkeys around if you get no response as you could simply be dealing with an unresponsive turkey. There is no locator call that works every time.