I have all three and any will take a moose out to 150 yards, although between the 30/30 and the 44, the 30/30 will do it easier than the 44 will. The 30.06 will trump both with ease of use and power, but the lever guns are easier to carry and funner to shoot imho. The 44 is a very fun gun to own and shoot and there are lots of off the shelf ammo to choose from, its just intended for pistols but any that I have shot works fine in the lever gun. Out to 100 yards, the 44 is a great little gun, out to 150 the 30/30 is a bit better, and beyond that the 30.06 wins hands down.