So I bought a set of Factory tension Wolf Recoil and Firing Pin Springs for my series 70 Mark lV 1911. Both springs are quite a bit longer than originals. Installation simple enough, but when I follow safety check steps from owners manual, something isn't right. According to manual, with an empty magazine in gun, slide should not fly closed when pulled back and released. Slide should remain open. Mine flys shut with or without magazine installed. Every thing else seems to check out. To much grease somewhere ??? Any thoughts from the experts? Thanks