I hunt with a Bowtech pro 40 dually... use 125 grain Thunderhead 3 blade broad heads.. and use this for a back up.. 14 inch bladeRanger Knife.., you've got to be close and personal to make a lasting impression.
I have to agree with bigcountryon this. Nothing less than a .44mag or .45lc. Also, never forget a good hunting knife.....I learned the hard way and mossy33oakhad to lend me his knife to finish the job.