HEy Coyote,
I killed a gobbler back in april 2007 with my bow, and I used a stone point. When the turkey came in, I aimed for a spot where 2 different feather types formed a "V", and I aimed for the point of the V. It was broadside, but it was low, just below the wing but above the drumstick. The stone point missed the lungs (it was too far back) but it severed a major artery. that bird only ran 40 feet, stopped, sat down in the grass, and died. I was absolutely amazed at how fast that stone point killed that bird.
I agree with what others have said here....don't shoot a turkey in the wing, especially with a stone point. Those wings are like damn armor, and their bones are surprisingly heavy and stout in the wing. Aim for just under the wing, and a broadhead or stone point should be effective.