Federal Grand Slam turkey loads

[Vinci1964]

Anyone try these yet?

I used to shoot Federal Mag Shoks at copper plated 3" #5 with an 870 and a kicks goblin thunder choke. That was a lethal combination and I hauled a lot of gobblers out of the woods.  These grand slams look a little different and they claim great performance on a budget. Not sure if they are as good as the Longbeard XR.