This stuff is also called "Fully Encapsulated" ammo. It's only reason for existence is for indoor range lead contamination. Personally, I think it's all much to do about nothing. Most all indoor ranges today either have had, or have installed, excellent ventilation systems. The indoor range by me has such an efficient system when your in the booth shooting, you can actually feel a strong breeze at your back. Anything you fire in the way of particulate contamination will be carried downrange in very short order. About all this stuff is accomplishing is to drive up the cost of shooting even further. I strongly doubt that anyone could shoot enough lead bullets out of a gun to cause health issues. I grew up shooting .22's at indoor ranges, and have cast and shot lead bullets most of my life, and have never had any issues involving lead. My blood is checked about every 3 months. Bill T.