Good to know. Lots of 444's seem to get loaded with pistol bullets. If I wasn't a handloader I might be interested in a .444 over a 45/70. Or a .450 Marlin, I guess.
Obviously, for hunting, it is not wise to load pistol bullets in a 444, if you are thinking the hollow points or some lighter projectiles than 240 gr. But someone over on the Marlin forum pretty well debunked the "pistol bullet" myth a while ago with some pretty extensive testing on the standard 240 gr flat nosed projectiles you get from Remington. They are exactly the same as the ones you get in the 444 factory loads, based on his ballistic testing and cutting them apart, weighing, measuring, etc.
I've shot moose, several deer and several black bears with the 444 Marlin 240 gr Remington factory "pistol bullet" loads, with no problems at all. Sometimes you could drop golf balls in the exit holes. I also handload now, using the Hornady 265 gr, and the Ranch Dog molds for 265 gr and 300 gr leads. But truthfully, most of the animals I've shot were in the years before I started handloading for the 444, and with the Remington "pistol bullets". I can say from my experience, they don't fly apart in flight, nor do they all go to pieces on impact, nor fragment at the hide, or any of the other myths you sometimes hear. They penetrate deep leaving big holes, and normally exit leaving a bigger hole.
As for the 44 mag with the Remington "pistol bullets", the one bear I shot with it was a one shot kill. Never tried it on moose. For the elusive 3-day moose season here in NB, I'd go with something with a little more range.