I'll stick with my 20" barrelled browning A-bolt 284win. It has a 2-7 leupold mounted on it, on 2 power it's fast on target in the bush, on 7 power Im able to shoot out to 400 yards. There are many rifle/cartridge combinations that work well and qualify as being the ultimate deer rifle depending on the individual. Something else that should be considered, what happens if you got an elk or moose draw. Do you pack two rifles or is your deer rifle capable of double duty. The ultimate deer rifle should be, I know my 284 is.
Extended detachable magazines on a deer rifle is gross.
Detachable magazines that clip into a hinged floorplate = ultimate!