I would use mine.I would also make sure I had a good heavy 300gr+ bullet in it.If Fred Baer can kill an elephant with a bow you can kill a big bear with a 444. You need to know it's(444)limitations,range ect.
Now, if I didn't have a 444 already and wanted to go on a big bear hunt. I think I would buy a 375 H&H.
So, if your buying a rifle for a big bear hunt.Get more gun than a 444 Marlin.JMHO
