From what I have read and the box I shot.
It's heavyer than steel shot and lighter than Hevi shot.
25 percent heavyer than steel shot.
It comes in 25 rnd boxs 3" 1 1/8 oz at 1500 fps
I know I got my box at Cabela's(not on web site) and you can order it direct from Hevi shot.
It is also avaible from Woods and Water and Mack's Prairie wings