Federal 40 S&W 165Gr TSJ Syntech Jacket American Eagle (FAE40SJ1)Conventional ammunition causes metal on metal contact between the bullet and bore, which can shorten barrel life and rob accuracy. But the all new polymer encapsulated Syntech bullet prevents this, while eliminating copper and lead fouling. Combined with specialized clean burning powders, your gun will stay cleaner, longer, so you can shoot more and shoot better. The exclusive lead free Catalyst primer provides the most reliable, consistent ignition