load, 850 fps, with a 230 gr load. Might get a bit more velocity with a cast bullet, I suppose. You don't need or want increased penetration for deer. Shooting at the south end of a northbound one is a bad idea, even with a much more powerful load.
Why bother with the .44, if you have a .45? I aint buying a special gun just for deer, when I already have one that will serve, and also be the ccw gun (which the .44 can't do). I can just run the reamer .060" deeper into the chamber of a used ($50) fully supported barrel, use 460 Rowland brass, my .45 ACP dies, and get a 185 gr jhp to 1500 fps if I want, in the 1911. Cut a .44's barrel to 3" long, so that it's the same 8.5" OAL as the 1911, and see if you can get a 180 gr jhp to 1500 fps. LOL. Not that anyone needs or wants that sort of power or recoil, but it does show the potential of old slabsides.