You have 3 different types of bullets with 3 different designed results going on.
Sst stands for super shock tip it’s more of a semifragmenting round i would expect to see core separation with the sst. It has worked well for me on deer and I haven’t used it on elk or moose.
https://www.hornady.com/bullets/sst-...-shock-tip)#!/
The federal fusion is a bullet designed for deep penetration and weight retention with a core that is bonded to the jacket The Hornady equivalent would be something like the American whitetail round.
https://www.wideopenspaces.com/what-...l-fusion-ammo/
The super x uses a power point bullet and has a jacket that is stretched over a lead core to the shape of the bullet. It isn’t bonded and I would expect to see core separation on larger game if the rounds are recovered. this one is an old design made for penetration and less fragmentation
https://www.americanhunter.org/artic...r-power-point/
None of these bullets are bad they all work for sure but there all also in the budget/entry level of factory loads. Try and match your ammo to your style and game your hunting if your just smashing pop bottles and want to see them atomized like they where hit with a death ray maybe experiment with some full fragmenting varmint rounds.