It's fast enough to get there.

I wouldn't worry too about kenetic energy. In the best testing I've seen (from Dr. Ashby), it isn't much of a factor in penetration potential on live animals. I'm sure your setup has more than enough energy to drop a deer or an elk, though I wouldn't dream of using for real big game. The real question is, can you hit what you're aiming at, with a broadhead attached while shooting with a brisk side wind?