I have a double action pistol that has adjustable sights. When I shoot it in single action I am hitting three inches left at twelve yards. When I shoot it double action at twelve yards I am dead on center. Two issues I would like input on. The first is that twelve yards just happened to be the distance the backstop was at but you can never know the actual distance you may need to fire from (this is a defensive pistol). The second and more importantly, if this is a defensive pistol I would most often be shooting it double action. Since I am hitting dead center should I leave the windage alone?