I guess the 4 grizzlies I've killed with a Marlin 444 havent read this thread because they all died. The 444 is a fine rifle for anything in NA. Anything the 45/70 will do, so will the 444. I've used both hard cast 300 grain slugs and the Hornady 265 grain bullets. Either bullet will shoot clear through a grizzly or moose for that matter most of the time.