The name Fusion seems to invoke an image of power or something special in some unknown way. But in reality it's more of a marketing thing to create hype. We don't know what a given bullet will do until we test it for accuracy in our rifle of choice... then we have to see how it will perform in the field - under real hunting conditions. In fast rifles the cup and core will do the job - but they can split into pieces at closer ranges, but seem fine out a longer distances...
I think if one is familiar with a 30-30 then one can compare other bullets and calibers to it. For most the 30-30 clearly does it's job well enough at or around 100 yards. Yet it can reach out to 150 or maybe 200 yards, assuming it's a well placed shot. Any other rifle other then that it more of the same. And is more effective beyond the typical range of a 30-30; as described above.
I used plenty of cup and core bullets - especially when I was younger and bought what I could afford. For the 30-06 I found the Federal Sierra Game Kings were sorta idea at the 165 grain weight. They had velocity, sufficient weight, short reasonably flat; and were good for moose. Also, I like the Nosler Partitions - but I've found the factory loads were not as accurate as the SGKings.
My starting point has been the same for years... Accuracy first. And I don't worry too much about the type of bullet. I don't shy away from buying the less expensive bullets - if they are accurate in my rifle of choice. I may use Partitions for elk because I believe that they are tough animals. And good shots are necessary to bring them down.
I also feel that the average hunter should get proficient enough with his rifle to kill a deer, moose, elk or caribou out at 300 yards. This means practising enough to know the drop and windage of a given bullet. I've dropped moose out to 450 yards(30-06 and 220 grain) and 600 yards(300 Win Mag 180 grain) So it's all do-able but one has to become very familiar with the round and the conditions.
It all takes time to know this stuff, so try what you want to try... If you rifle shoots them accurately, then stretch out the yardage. It's critical to get past being nervous or being too excited, because these conditions will create inefficiencies in one's shooting.
Other then that... enjoy your time out there, and build you knowledge and experience. Keep your knives and brush axes sharp. And have fun while your doing all this.