DuckSouth.com

The higher the density, the more retained energy at the same speed for a projectile the same size and weight. I think I said that right. So, you can get more pellets and more energy with smaller, more dense shot.

Try reading this:

http://www.tungstensupershot.com/pages/technical.asp

TSS is the baddest stuff on the planet from my testing on flyers for dog training. It is all retarded expensive any more.