One thing I would always recomend for archery hunting turkeys is an ARRESTOR of some kind for your arrow. These will stop the arrow inside the bird and not allow a pass through. There are many different kinds, right from home brew (rubber bands, washerrs, O-rings, t) up to store bought units. I use the Zwickey Scropio's as I have found them to be the best and have the least effect on your arrow. They slide on the arrow shaft (must get corret size for your arrow shaft) to stop the arrow from passing through. The head will pass completely but not the fletching making it difficult for the bird to run or fly if you do not make the bst of hits as said above, the vitals are small.

Good luck.