The Shot-Lok concept could become a game changer for Winchester, and as you read this, the company is looking at incorporating the technology into some of its other lead loads. One of the benefits of a tighter pattern is that it allows you to move down in shot size and still deliver plenty of pellets on target. There are potential applications for Shot-Lok in home defense, predator hunting, and 20-gauge rounds, Winchester Product Manager Brad Criner says. Shot-Lok could be used in any application that calls for lead pellets and tight patterns. The resin will not likely be used in steel shells because steel is harder than lead and not prone to the same deformation, Criner says.