300 WSM Hornady American Whitetail 165gr InterlockProven . 300 WSM Deer Loads Hornady American Whitetail InterLock The Hornady American Whitetail . 300 Winchester Short Magnum 165 Grain InterLock is a dependable deer hunting load built for the . 300 WSMs magnum performance in a short action platform. The InterLock bullet features an exposed lead tip for controlled expansion and an exclusive InterLock ring a raised ring inside the jacket embedded in the bullets core that keeps the core and jacket