If you like those shells, it would be a good time to find and purchase them. No more of the Heavyweight shells will be loaded in any gauge or type of shell. All new turkey loads will be "Heavyweight TSS".
I have been shooting prototype loads in 12 gauge and .410 bore for the last several weeks and will publish an article about my findings on January 3, 2018. That date is the earliest that I may share what I've seen, per agreement with the folks at Federal.
I hope to also be able to report on the 20 gauge and 3rd Degree, in mid to late January.
Thanks,
Clark