The Mack's catalog has an ad for Hevi-Steel towards the very back (page 135 in the Winter 2004/2005).

Also, the Winter 2004 Delta Waterfowl magazine has an article (Shooting, page 20) on all types of shot and what is needed to kill ducks with a 95% or higher probability level (235 foot-pounds per square inch). Allegedly this new Hevi-Steel is deadly at 41 yards with #4's that shoot 1500 feet per second. Remington Hevi Shot #6's were good up to 46 yards and moves at 1,325 feet per second. Of course you get more chances with 6's over 4's but for 60% less money I hope this new Hevi-Steel works. I bought a couple of boxes for $19.99 per box of 25 (Remington Hevi Shot is around $20 for a box of 10, highway robbery in my opinion). Hopefully we will find out tomorrow.