There is an article in Fur-Fish-Game on this load. It says it gets 2000 fps with a 410 grain slug. This gives 3,643 foot pounds of energy. At 200 yards you have 1.227 foot pounds of energy. In the December 09 issue.
The problem I see with this load is 1) You have to buy a special gun to utilize it. 2) Loads like the Remington Core lokt in 12 gauge will give you 530 ft lbs of energy
MORE @ 200 yards while generating 600 ft lbs of energy
LESS to have to deal with @ the muzzle. The Hastings load has a terrible ballistic coefficient. In other words, it kicks like a mule @ ignition and sheds energy like crazy.
Now, Hastings is trying to change the bullet in the slug to give it better ballistics but the cost per bullet for Hastings is reportedly $2.00 per. That's
THEIR cost. I'd hate to guess what a loaded shell will cost the end user.