JUST A FEW LEFT!! The TURKEY TEST TUBE is designed to offer a similar resistance to shot pellets that they would encounter when impacting a mature wild turkey’s head. The TURKEY TEST TUBE will accurately represent the pattern of shot a particular gun / load combination will deliver on a target roughly the size of the kill zone of a turkey. If your shotgun shoots to point of aim, you will easily be able to see if you are getting enough target coverage by simply looking at the front of the TURKEY TEST TUBE. Then you can you flip it over to calculate penetration percentage. Many factors can influence shot penetration, The barrel length, choke tube, and ammunition type all play a part. The TURKEY TEST TUBE will allow you as a hunter to determine which load will give you the type of terminal ballistics that is best for your shotgun and the way you hunt. LIMITED QUANTITY AVAILABLE.