I currently have an old .50 cal percussion CVA hawkin rifle (1 in 66 twist). I live in Anchorage, Alaska. Anchorage is starting to open up moose hunting within and around the city limits, but it is with either a bow or a muzzle loading rifle. My concern is if my current rifle is up to snuff in taking down a moose? Or do I need to upgrade to a .54 cal rifle with a 1 in 48 twist barrel, using sabots, conicals, etc. Thanks, Doug B.