Figure out what type of shell your going to use first. There are basically three main types of turkey shells. Lead or copper plated lead. Lead and some form of hevi shot.Then the different HD loads of tungsten. All are capable of the task and have different benefits. Cost is the big difference and can range from $20 for 10 lead rounds to $80 for 5 rounds. Most chokes are designed for certain types of shot and even the shell type. Firing a load of tungsten out a tightly constricted tube designed for lead could be hazardous to both shooter and gun. Buy a choke designed for the type of shell your going to shoot and pattern test so you know your point of impact and the range capability of your gun/shell combination. Good luck