Gobble calls can call in other hunters it don't matter whether it is public or private.
But a gobble call used at the right time can tip the battle in your favor.
I had a sequence that 3 hens and a very nice Tom hit the field I was hunting.
Tried a few yelps and the lead hen picked her head up and lead the whole group back up over the top of the ridge.
But I was sitting where they wanted to be. I did have a few decoys out. Little while later here they come again. Only this time I sat quietly until I heard a train approaching. I had sat this field before and had Tom's go nuts over the train whistle. So I thought why not? I let the train get close and the sound of the train whistle I used my Red Wolf Gobble call and went nuts. Everytime the train whistled I gobbled 2 to 3 maybe 4 times non stop.
The third time doing this the lead hen picked her head up and came running across the field. The other 2 hens saw that and did the same thing. In my lap in a flash. Flat out left the following Tom. Had to wait but....Shot that Tom at 25 yards.
I also use the call on early morning scouting trips. It can be enough to get a tom to answer back. They tell me where they are.
BUT!!!!!
AS other have quoted. Using a gobble call -give that cal great care must be given.
It will call in other hunters. And as for a realistic sounding call thst is very easy to use The Red Wolf is that good.
I have also used the Primos and Quaker boy shakers.
Good calls but Reds call out lasted both.
and I have used a rubber banded box call in a pinch.
They all work.
If you want realism...try a Red.

one thing.....at the end of the season take your shaker and seal it in an airtight plastic bag. It will help slow down of the latex diaphragm from degrading.