Rugger sr1911 Hard cast flat nose bullets are non-expanding, powerfully penetrative bullets that are designed with your woods defense needs in mind; whether fending off wild hogs or black bears, the hard cast flat nose bullets are consistently effective in taking down any wild animals that you may encounter. In contrast to the round nose non-expanding bullets, the flat nose bullets are able to pierce through dense bodies of mass while maintaining their nose forward position, which is optimal for maximum penetration. ­Hi-Tek is a polymer based compound that not only reduces fouling in your barrel, but also substantially reduces airborne lead contamination (allowing for use in some indoor ranges). The elimination of the wax lubrication combined with the reduced airborne lead contamination results in considerably less smoke produced with each shot. Hi-Tek is NOT nylon, PTFE (teflon), or Molybdenum. All Underwood Ammo rounds utilize flash suppressed powder so that your vision will not be compromised if it becomes necessary to use your firearm in low light.