I have the Marlin Cowboy but mine is chambered in .45LC . Just a little more case capacity than the .44 mag and i went to the .45LC for 300 grain bullets . I use 300 grain hard cast gas checked over 23 grains of H110 for 1,840 fps . Two deer , 3 bear and 1 moose . Both deer were about 110 to 120 yards . 3 bear were 50 to 60 yards and the moose was about 80 yards . This rifle with this load gives me 5 shot groups into 1.500 inches consistantly at 100 yards . I kinda , sorta messed up the shot on the broadside moose by pulling the first shot and putting the 300 grainer directly into the should . I saw the impact . The moose went down to my suprise but was trying to get back him . I ran to it and finished it off with a headshot . The whole shoulder bones the bullet entered were shattered , the opposite shoulder was broken and the bullet was found in the inside of the hide . Although trying , that moose wasn't getting back up . The bear and the deer were complete shoot throughs , a big hole in and a slightly bigger hole coming out . Those were one shot kills . 2 bears were killed on the spot with 1 making it 200 yards where i found it dead . Both deer took off and i found both dead 200 yards from where i shot them . The downside of my 300 grain hard cast is that they deform very little but the upside is that they will smash through heavy bone . For deer or bear soft or hollow points may be better . From my experience i'd go to 150 yards on deer , 100 yards on bear and 75 to 100 yards on moose . 23 grains of H110 under a 300 grain bullet is a top load but lots of guys use it and i experience no signs of pressure . I use the same load in my Ruger Super Blackhawk when i go deer hunting in Minnesota and Wisconsin .


















































