Well, I gotta respectfully disagree with that statement. While the 450 Marlin is definetly a more powerful cartridge the 444 certainly aint no slouch.

If all you shoot are the Remington 240 grain loads they are pitiful. However, Corbon and Buffalo Bore load some pretty stout ammo for the 444 Marlin.... along the lines of 300 grain bullets at 2100 - 2200 fps. These loads are certainly capeable of killing anything you would want to hunt with one.... up to and including dangerous game.

Hornady also loads their 265 grain bullet at over 2300 fps for the 444.

Conley precision also loads some great 444 ammo with bullets like Barnes, Nosler partition, & Swift A-frames.