I have never shot a moose, some cow elk, lots of deer and other critters. I use both a compound and also a recurve. 55 pounds should be enough at your decided distance, but what kind of broadheads are you going to use? I reconmend using 2 bladed type for the penatration factor. I my self use in both my 60 pound recurve and also my 70 pound compound, magnus 100 gr. 2 blade stingers. they are great flyers no matter the type of bow, lifetime warranty, if you mess it up, send it in for free new ones. very accurate. they come in 85gr, 100 gr, 125 gr. I use the 100gr stinger buzzcut, they will do the job to anything, plus they were designed for big game from pigs, deer, all the way to the moose and big bears, massive tissue damage, deep penatration, lots of blood loss in a short time.
birddogs rule and all the rest drool, for birddogs love you for you and do not ask for anything in return but love so hug your birddog