Just keep working the birds. As others have said, he'll come, just hang in there.

A good friend of mine has been hunting for several years and never got a gobbler. Our season opened here on the 20th and he has gotten two gobblers since. One suggestion, if you can use a mouth call, use it with another call at the same time, make it sound like you are more than one hen. If you can't use a mouth call get another call that you can work along with the one you already have. Good Luck.

dog1