Wilson Combat 07429220SP: The Xtreme Penetrator lead free Fluid Transfer Monolithic (XP FTM) product line, for both handgun and rifles. The progressive nose geometry allows for deep, straight penetration while creating a permanent wound cavity diameter exceeding that of most expanding bullets. To top it off, the bullet is solid copper and is able to overcome barriers to penetration, is environmentally friendly and target unfriendly. Penetrating barriers such as drywall or heavy clothing prior to impacting the intended target doesn\'t have the potentially negative effect on the Xtreme Defense that it does to conventional hollow point bullets.