Ballistic terminology in the shooting world is some thing that is nice to know, but I don't view all of it as a "need to know" for hunting applications for big game. A couple of them I don't consider important are "energy" and "cartridge efficiency". I really don't think they have a real or practical application for big game hunting and are not true indicators of a cartridges performance on big game.
Trajectory and velocity are important to me, I need to know my bullets trajectory at what ever range I may shoot at and velocity has the most influence on my bullets trajectory. Both are easy to figure out with a chronograph and some range time.
But, most important to me is my choice of a bullet and how the bullet performs when it hits a big game animal at different velocities. So I have spent most of my 50 + years at the loading bench trying to load up what I thought was the best ammo for the type of shooting and hunting I do. In the end for big game hunting it was all decided for me by the bullets recovered from animals that me, my family and friends shot. If a bullet exited and was not recovered and the animal died quickly the gut pile was always proof enough the chosen "load" worked well. If we found it in the animal and the animal died quickly then that was also proof enough the "chosen" load worked well.
Boat tail bullets, I am not at all convinced they have any practical advantage over a flat based bullet for any big game hunting.