This is the tough part. There's no way of telling for sure what choke is going to throw the best pattern, you have to try different chokes and turkey shells to figure out the best combination out of your shotgun. You SHOULD do OK if you buy a Kick's choke, Carlson choke, or Primos Jelly Head, but if you are looking for optimal results, you'll probably have to experiment a little. Probably not what you wanted to hear.