I shot my moose in ND with a Matthews Legacy at 65#. Used a Beman ICS 340 arrow at 27 1/2" tipped with a 100gr. Magnus Stinger 2 blade. Had a complete pass through at 45 yds. Moose made it 65 yds. before tipping over. Have also killed numerous deer, 3 antelope, turkeys, 2 black bears and a grizzly bear with the exact same setup since. Shot placement is very important as well as knowing your equipment and your capabilities.
Good Luck with your hunt.
Magnus Sringers and buzzcuts are great. I am pretty interested in the new black hornet from them. Looks like a great broadhead http://www.magnusbroadheads.com/black-hornet/