In manufacturer’s testing the Strangler™ was compared to the tightest choke manufactured and permitted by OEM for each indicated firearm. 2 3/4 & 3 inch shells were used with the same size shot being used with OEM choke and Strangler™. Targets were shot at a distance of 40 yards and results were taken on a 30 inch diameter circle. Penetration was determined by measuring the depth of shot imbedded in blocks of solid wood (Pine) at 30 yards.