He could be using a launcher, just tuning it to be nock high to get off of the blade quicker.
A drop away would be a better choice, at least for the likes of me.
Then again, he's good enough, he could use a whisker biscuit!
I watched Chance at the shoot in Pittsburg a few years ago and even compared to the other pro's around him, he is super steady. He was amazing to watch.