ive got one of those chicom crossbows. it is set up for 17" arrows...not 20", so that lowers your energy right away.
it is nowhere near as fast as my 'slow' 240 fps Horton yukon SL.
it is a 15 yard weapon under PERFECT conditions.
that said, i might try to get a doe with it this year with Ohio's new, less restrictive doe permits.