The FTX bullets are hollow points with a piece of plastic for a nose. They aren't worth a $hit. The Core-Lokt is a deer sized game bullet, and it's awesome. For elk and large game you need a real bullet.
A HP is not necessarily a bad thing - especially at .444 downrange velocities - unless you're shooting elk in the azz and then I'd prefer a 300g hardcast.
When it comes to FTX and Core-Lokt, I'd much rather hunt elk with a .444 Marlin and a 265g FTX @ 2325fps than a Remington 240g SP @ 2350fps. Using Hornady and Remington loads, the FTX has more velocity and energy at 300 yards than the Core-Lokt has at 200.