I got a 400 pound Black Bear this year with Snyper; I used a Mathews Ultra2 with 67Ke; the arrow hit bouth lungs but a blade broke in the exit hole; the bear ran only 60 yards.
I also shoot a desert pig (60pounds) last month with the same setup and didn't got a pass trough, one blade broke and the tip bleand 90 degress.
I used to be a Mech fan but I'm thinking of trying muzzy for a change.