I've called them a couple times when I've already been close to them when I was hunting in Texas. The last time, I saw them go into some thick mesquite from a field. I followed them in with the sow protection sound playing on my Fury tied to the back of my belt. I had a big sow come in to about 40 yards. I shot her and kept following the group. A medium sized boar came back to me and I shot him. I kept after them and another medium sized boar came back and I shot him. At that point the whole bunch spooked and left.
One other time, I could hear a herd grunting in a thicket and started the sow protection sound and had one come to the edge and I shot it. While I was waiting for the group to leave the thicket, a huge boar came charging at me from my back side. I was shooting an AR and got off a couple quick shots from about 15 feet. That turned him back into the thicket and was the last I saw of him. It is pretty ironic that I bowhunt in grizzly country and have come closer to being mauled by a hog than a grizzly.
Other than those instances, I've used the call several times and never had one come in without me being very close to them. I have had them stop after I jumped them though.
I don't get to hunt where hogs are very often but it has been a blast.
