JF, I do not see any reason why your 230fps bow would not easily kill a deer, elk or bear. Remember, archers were, and still are killing these animals with recurves that rarely exceed 200 fps. If you're confident with it all you need is a nice razor sharp fixed blade cut on contact broadhead and you will be good to go. Remember, a fast bow that you cant shoot well would just mean you miss faster! My recommendation for BH would be a Magnus Stinger or Muzzy Phanthom or similar. And with your set up, I would suggest using the heaviest, properly spined arrow that your bow can accurately shoot.