There are times when Tom turkey just will not
Respond to whatever you are trying to use
To induce a shock gobble. If you can get a
Shock gobble that is always best.

I've had good luck in those instances when the
Toms that I was reasonably sure should be
There but would not shock gobble, by using
A hen call and then sitting down and assuming
The birds heard the call and were coming in
Quietly, or they might gobble and come in.
Over calling is never a good thing. Doesn't
Always work but frequently enough that
It's worth a try on those days when you
Can't get a shock gobble.

Good luck