They can be in all probability employing "plated jackets" take a magnet to them see when they entice a magnet. You then have steel plated copper coated bullets. A further effortless take a look at. Take a pocket knife to your jacket If they're plated it can Reduce into it https://www.safeheavenfirearms.com/product/barnes-ammo-6-5creedmore-127-gr/