I have several and hunt regularly with them, rabbits and squirrels beware!!!. as for power, my barnett with the upgraded bands I put on it will shoot a 36cal. lead musket ball thru a car winshield at 20ft. like a bullet , makes a evil dent in a 55gal drum from 25ft. that powerful enough for you??. heres the trick, If there is a supply store that sells supplies for commercial fishermen you can get to you can find surgical tubing large enough to fit over factory bands. sort of makes it qaud powered. I suppose If ypu could hit a deer in the head it would certainly kill it.