the only time when we use it is when the herd spooks or busts. this has been 80/20 for us. if theres a sow with piglets she coming back to get them. if you call. we had a herd of 50 bust on us. we pulled out the call and got on top of a big rock/boulder. a sow with 4 or 5 others circled us for a few minutes. it was really neet to see. the best part, it was dec. 31. lucky pig! . but calling is calling you never know whats going to happen. all calls work. it just depends on the situations. my buddy has brought pigs back no calls just his mouth. he grunts just like'em and hes killed his last two like this. and good luck to you. hope you dont have to use it.